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Posts posted by imatfaal

  1. You might want to edit your first sentence for clarity "animals that are invertebrates"


    I think the system developed along the lines of "we are vertebrates therefore..." Its a question of arbitrary line drawing in the end; our fellow man, other primates, mammals, vertebrates...single-celled thingies - at some point we decide that care and supervision is necessary. We try to make this a rational objective decision based on the test subjects potential for feeling pain, anxiety, stress etc - but let's face it we are far from being to quantify this within ourselves let alone a species with whom we cannot properly communicate.

  2. A couple of points,

    Deer have no gall bladders and I rather suspect horses don't either; not many people know that and that's why I chose that particular property to ascribe (or not) to a unicorn.


    I had a feeling it might have been - should have checked. Have checked now with the fount of all knowledge: "Equids do not have a gall bladder, so bile flows constantly, an adaptation to a slow but steady supply of food, and another reason for providing fodder to horses in several small feedings."

    I think we could go around the block many times on the logical/philosphical bit - and I have no intention of starting :)


  3. Marat


    Might give that a try - although I would have thought it would raise ethical issues rather than solve clinical. It sounds interesting and most disturbing - is it a good read and accessible?


    Corollary - it is unethical or at least ethically dubious to use the results of historical highly unethical studies? ie a fruit of the poisoned tree in research ethics. What about when the displacement is in space not time? obligatory qv the stanford experiment

  4. OK Tbird


    You need to start again from your original formula mgh = k(h-l-L)²/2 - cos you have made a couple of errors (post#3 had no factors of two and post#11 has two )


    1. Are you sure this is the correct starting point - I haven't checked its logic - I presume you are happy with it

    2. Multiply through by two

    3. multiply out the three way bracket (you have done this already in #11)

    4. multiply the contents of your bracket by the k outside

    5. group together the h2 terms (should be only one), the h terms (should be three), and the no h terms (should be three)

    6. Is there a common factor to the entire equation - if there is factor it out. (good form but doesnt apply here)

    7. take the h2 term outside a bracket and put its coefficients within the bracket (good form but doesnt apply here)

    8. take the h term outside a bracket and put its coefficients within the bracket


    You should now have an equation that look like this

    0 = something.h2 - 2h(three somethings) + (three other somethings)

    which is basically your standard quadratic

    0 = ax2 +bx +c

  5. The question is really about legality.

    When subscribing to this Forum, we must agree the rules. It is a kind of agreement, a contract between the member & the Forum's staff. My question is about the legality of an agreement that goes against a Human Right. IIRC you cannot make any contract that goes against the Law.


    1. Whilst I wish the UDofHR was law, it is not. Within EU the EConventionHR can have the power of law within certain states - other states have included HR legislation.

    2. In jurisdictions where it is law; Legislation like this acts on the state, on state bodies and other organisation that fulfil a function of the state - the SFN are none of these.

    3. You are correct that no contract can be validly made to break criminal/civil law - however it is quite ok to sign away some of your rights within a contractual situation (we all do so regularly)

  6. I'm a staunch atheist so I couldn't get through the third question

    "Any being which it is right to call God must be free to do anything."

    There is no being which it is right to call God and therefore it is impossible to rationally assign properties to it.

    I couldn't answer yes or no to that any more than I could answer the question "Do unicorns have gall bladders?"


    How did you decide what properties God would have?


    Presuming that if a unicorn exists it is defined as a white horse with a horn on its head.

    Q If the Unicorn exists does it have a gall bladder

    A Yes (I think horses will have gall bladders)

    Q If the Unicorn exists does it eat rocks

    A No - we have defined it as very horselike


    To deny the existence of a Unicorn one must have a fairly clear conception of what a Unicorn is defined as (ie it cannot just be defined as a mammal with a spiral grooved horn on its forehead - qv narwhal). Doesn't the same apply to god?




    You have been awarded the TPM medal of honour! This is our highest award for outstanding service on the intellectual battleground.

  7. I think Lemur has it right. Budrap, you seem to be calling for a model with no givens, no axiomatic base; all models, all theories, if you dig deep enough, rely on axioms that are not provable. No cosmologist would claim that we have the whole picture or that the current model is without flaws - but it is highly unlikely we will come up with a model that from its genesis is perfect. We model, measure, recalculate, and reappraise - just because it is a bit shonky now does not mean it won't get better. The model we have now does come up with predictable results which have been OK - it also as you point out has the problem of dark matter to balance galactic spin, and dark energy to drive expansion.


    However, dark matter is beginning to look a pretty cool shout - read up on the bullet cluster collision, pretty much as dark matter theories would have suggested.

  8. I would have thought that reflection of photons (rather than reception/absorption) would generate the greatest force on the solar sail - if we conserve momentum then an absorption would give a "push" of a certain amount but a reflection would have to give twice that much.

  9. No you cannot use FOIL - but I was illustrating the principle, and you seem to have got the idea. As these are just numbers represented by letters wouldn't you agree that Lh = hL, that lh=hl and that lL=Ll ; and I said simplify not cancel.


    ie similar to

    (x+y+z)2 = = x2 + xy + xz + yx +y2 +yz + zx + zy +z2 = x2 +y2 +z2 + 2xy +2xz +2yz

    you have to be a tiny bit more careful to get your signs right than the above example - but it seems you have that right so far.

  10. Twinstar,


    As Timo pointed out you have not multiplied out the bracket correctly; unfortunately you cannot just take h2 out of the bracket. In the spirit of not giving an answer, perhaps this will help you realise/work out how to go about multiplying out brackets.

    we can look at the simple example of all just two terms

    (x-y)2 this does NOT equal x2 -y2 this would be making the same as the mistake you made above. The way I would do it in longhand is as follows:

    (x-y)2 is also written as (x-y)(x-y)

    now to get the correct answer we need to multiply each of the terms in the first bracket with each of the terms in last and add the results together. My maths teacher called this FOIL - you will see why

    First terms x times x = x2

    Outer terms x time -y = -xy

    Inner terms -y times x = -yx

    Last terms -y times -y = y2

    so (x-y)(x-y) = x2 -xy -yx +y2

    obvious -xy is the same as -yz so we can rewrite as

    (x-y)2 = (x-y)(x-y) = x2 -2xy +y2

    For your equation you still need to multiply each of the terms in the first bracket with each of the terms in the second bracket - This will give 9 terms, which will then simplify to 6 (because hL is the same as Lh etc.)

    Hope this has helped a bit. Come back when you have made a stab at it.

  11. Isn't pedophilia illegal? For a reason? (An obvious power differential comes to mind, as well as psychological impressionism.)



    It's important to get definitions correct; paedophilia is an aberrant state of mind, a mental illness, an affliction - and as such cannot be illegal under any sensible system of law. Acting on those deviant desires is rightly illegal - sex with a minor is automatically rape (no consent can ever be given by a minor), distribution of pornography (visual or verbal) will be covered by obscenity laws or specially enacted laws, and I presume that any form of encouragement of others would be prosecuted under conspiracy, joint enterprise, or specific laws covering promotion of illegal acts.



    On this individual case it seems that ydoaps has a very good point - and it is a shame that more care wasn't taken to avoid procedural problems

  12. Dear Young and New Ideas - unless you work for an organisation devoted to promoting the ideas of evolution you have a great claim for unfair dismissal. If you are in the UK you must immediately contact your local Citizens Advice Bureau - if you are not in the UK I am sure you can find a similar alternative in your place of residence. Most employment lawyers will have a pro bono group that will be able to help those who have suffered discrimination for their beliefs and I think it likely you could get a payment and a lot of publicity - unless of course you are stretching the truth a little...

  13. I would go with a few years later obviously - thus my pin example - but yes the industrial revolution and growth of the power of capital required a change in the exploitation of labour. However, I think you are conflating the attempt to rationalize the pool of unskilled labour from which the owners of the mean of production could draw workers; with a general rationalization of society which never happened apart from with in the minds of some philosophers at large. The great founding socialogists Weber, Durkheim, Comte et al were studying perhaps the most regimented yet most laisez faire era of modern history - the late Victorian / early Edwardian age (as we would call it in the UK). I realise that I have seemingly contradicted myself but that era was an age of contradictions - I would recommend History of Sexuality - Michel Foucault which starts with an exploration of the perception and reality of Victorian morals and ethics in We Other Victorians. The idea that if a concept works well in the economy (which is by its nature should be quantised and countable) that it must also work for all other areas is naive and blinkered and has never be successfully produced - and even more so now, we are learning that the economy is not linear and predictable, but chaotic and emotional.

  14. Again it is difficult to understand whether the above is a manifestation of Poe's law or not. I only watched the embedded link


    1. It wasn't a debate - it was two sound bites stitched together with a film clip.


    2. Christianity doesn't exactly have a great non-aggression record - the church backed the iberian invasions of south/central america which almost wiped out a people, they encouraged the french expansion into africa and indochina, british brutality all around the world - even into the 20th century showed an astounding lack of reaction to fascist dictatorships in Italy, Spain, and Germany. And don't mention the crusades; I said it once but I think I got away with it.


    3. Equating extremists in any group with the main stream is a flaw in logic.


    4. "on any jihadist website" - is that where lawmakers get their information from? For crying out loud - give me ten minutes and I can find a website saying that the pentagon and

    whitehouse are just puppets of the scienceforums.net moderators who in fact are the twelve wise men of the la-li-lo-le-lu. Websites are not fact, nor are they representative.


    And that's just my initial reactions to 2:38 of the "debate". And before you paint me as a Islam apologist (in the new sense of the word), I am not; I really dislike Islam with a passion. But baseless assertions regarding the Koran and pointless allusions to battles in the 7th century are no way to promote one's views


  15. Athena - you or your friend must get in touch with the local authorities quickly as others above have suggested. In the UK this would be through the county archaeologist - but if you are unsure just get in touch with the archaeology department at the nearest university who will be able to point you in the right direction and will probably be very interested. If you wait and it gets concreted over it will be lost for several generations, perhaps forever.

  16. The general question posed is an interesting one, however. That is, how is it that we have now lived for the last four centuries in a scientific world which is quite concerned to be maximally accurate and rational in its design of economic plans, air conditioning units, airline schedules, mass production lines, mathematical hypothesis, computer programs, etc., but its thinking with respect to social organization still ranges from the ad hoc and imprecise to the grossly irrational and superstitious. You would think that all levels of rationality in a single society would be similar.


    "You would think that all levels of rationality in a single society would be similar." Why would that be a necessary conclusion? In every sphere of life we can identify easily quantifiable things and others that are completely impossible to rationalise or measure. This was the basic problem with Benthamism - possibly neat idea but the calculus is impossible. An objective measurement is necessary - without that any analysis is merely ideology masquerading as science. We can measure that 5 men making pins from beginning to end are slower at making pins over a week than 5 men dividing their labour - we cannot measure how this affects society's happiness and wellbeing.

  17. Michel - Leonard Susskind's series of lectures "The Theoretical Minimum" have a term dedicated to Special Relativity. These lectures are given at Stamford for a mature/amateur audience, but are still pretty taxing and are not 'pop-science'. From your comments on this board I am sure you would be able to get a great deal from them - and Prof Susskind goes through the mathematics of Lorentz transformations in a fairly step-by-step basis. You can get the lectures from Stamford or from Itunes

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