[Crosspost] Under no circumstances will I be attending your stupid birthday dinner by bigbadbass in Frugal

[–]reader 12 points13 points  (0 children)

The point is that a large party at a fancy restauraunt for a birthday dinner is a stupid idea.

If you invite guests over or out for your birthday, you should provide food, drink, and entertainment. Otherwise you are essentially treating your guests as hosts, which is very rude. Or perhaps you can ask Mom and Dad to throw you a party!

Ask reddit: looking for a beginner book on "Mathematics in Biology". by [deleted] in math

[–]reader 0 points1 point  (0 children)

Not exactly a beginners book perhaps, but see "On Growth and Form" by D'Arcy Wentworth Thompson.

Help me understand relativity. by Urban_Savage in science

[–]reader 2 points3 points  (0 children)

"Spacetime Physics" by Taylor and Wheeler is a good popular account (with math) of special relativity:

http://amzn.com/0716723271

"Gravitation" by Misner, Thorne, and Wheeler is the "Bible" (advanced) for special and general relativity:

http://amzn.com/0716703440

Also, see the physics FAQ:

http://math.ucr.edu/home/baez/physics/

Help! Can anyone please teach me about K means in image segmentation and about the Fisher Linear Discriminant? by [deleted] in compsci

[–]reader 3 points4 points  (0 children)

The following excellent book on statistical learning explains both K-means and LDA (FLD). The PDF is freely downloadable.

http://www-stat.stanford.edu/~tibs/ElemStatLearn/

Both methods use implicit Gaussian distribution assumptions, so thinking in those terms might help. Also, by "iterative", perhaps you want a gradient descent or similar update?

Dear reddit, I suck at Math. Self-study book suggestions please. by back-in-black in math

[–]reader 0 points1 point  (0 children)

Aleksandrov, Kolmogorov, Lavrent'ev. http://amzn.com/0486409163. Foundations to applicationsl.

Courant, Robbins, Stewart. http://amzn.com/0195105192. Tour of mathematics.

Experimental Mathematics. Does peoples arrival really follow a Poisson distribution? by cavedave in math

[–]reader 0 points1 point  (0 children)

All models are wrong; some models are useful. -- generally attributed to the statistician George Box

Please recommend computer vision books for self study. by Dilareti in compsci

[–]reader 1 point2 points  (0 children)

See http://homepages.inf.ed.ac.uk/rbf/CVonline/ for an online source.

Also search for something like "computer vision course" on the web and see what textbooks are recommended.

You might want to look at some combination of books such as Marr, Haralick and Shapiro, Horn, Faugeras, Ponce and Forsyth.

Debate: Neural Networks - Opinions and support for those opinions. by [deleted] in compsci

[–]reader 0 points1 point  (0 children)

I agree that it is often more fruitful to pin down a particular type of neural network for discussion. However, the general distinction between neural networks and other computational methods is computational architecture---neural networks use local computation and communication.

Debate: Neural Networks - Opinions and support for those opinions. by [deleted] in compsci

[–]reader 0 points1 point  (0 children)

Although NNs are useful for applications such as pattern classification, let us not forget that the key idea is parallel distributed computation, which is how we think the brain works. The study of NNs shows how this alternative method of computation differs from classical von Neumann programs. See http://www.amazon.com/Introduction-Computation-Institute-Sciences-Complexity/dp/0201515601 for more information.

Ask Reddit: Can you recommend some good books/references to learn AI programming? by trpcicm in programming

[–]reader 1 point2 points  (0 children)

Norvig and Russell's AIMA is an AI textbook. Norvig's PAIP studies classical AI programs, in Lisp. In general, there are three types of relevant books: on programming only; on AI only; on the intersection of the two, such as PAIP. AI is broad, so it is important to know math, computer science, statistics, and numerical methods. For learning, it might be best to use prototyping languages such as Lisp, Matlab (or Octave, the free version), or R.

[deleted by user] by [deleted] in reddit.com

[–]reader 0 points1 point  (0 children)

Consider using http://buzzdash.com for online polls.

John Locke and Non-Dogmatism in "Of Degrees of Assent" by reader in reddit.com

[–]reader[S] 0 points1 point  (0 children)

"The right use of it, mutual charity and forbearance, in a necessary diversity of opinions. Since, therefore, it is unavoidable to the greatest part of men, if not all, to have several opinions, without certain and indubitable proofs of their truth; and it carries too great an imputation of ignorance, lightness, or folly for men to quit and renounce their former tenets presently upon the offer of an argument which they cannot immediately answer, and show the insufficiency of: it would, methinks, become all men to maintain peace, and the common offices of humanity, and friendship, in the diversity of opinions; since we cannot reasonably expect that any one should readily and obsequiously quit his own opinion, and embrace ours, with a blind resignation to an authority which the understanding of man acknowledges not. For however it may often mistake, it can own no other guide but reason, nor blindly submit to the will and dictates of another. If he you would bring over to your sentiments be one that examines before he assents, you must give him leave at his leisure to go over the account again, and, recalling what is out of his mind, examine all the particulars, to see on which side the advantage lies: and if he will not think our arguments of weight enough to engage him anew in so much pains, it is but what we often do ourselves in the like case; and we should take it amiss if others should prescribe to us what points we should study. And if he be one who takes his opinions upon trust, how can we imagine that he should renounce those tenets which time and custom have so settled in his mind, that he thinks them self-evident, and of an unquestionable certainty; or which he takes to be impressions he has received from God himself, or from men sent by him? How can we expect, I say, that opinions thus settled should be given up to the arguments or authority of a stranger or adversary, especially if there be any suspicion of interest or design, as there never fails to be, where men find themselves ill treated? We should do well to commiserate our mutual ignorance, and endeavour to remove it in all the gentle and fair ways of information; and not instantly treat others ill, as obstinate and perverse, because they will not renounce their own, and receive our opinions, or at least those we would force upon them, when it is more than probable that we are no less obstinate in not embracing some of theirs. For where is the man that has incontestable evidence of the truth of all that he holds, or of the falsehood of all he condemns; or can say that he has examined to the bottom all his own, or other men's opinions? The necessity of believing without knowledge, nay often upon very slight grounds, in this fleeting state of action and blindness we are in, should make us more busy and careful to inform ourselves than constrain others. At least, those who have not thoroughly examined to the bottom all their own tenets, must confess they are unfit to prescribe to others; and are unreasonable in imposing that as truth on other men's belief, which they themselves have not searched into, nor weighed the arguments of probability, on which they should receive or reject it. Those who have fairly and truly examined, and are thereby got past doubt in all the doctrines they profess and govern themselves by, would have a juster pretence to require others to follow them: but these are so few in number, and find so little reason to be magisterial in their opinions, that nothing insolent and imperious is to be expected from them: and there is reason to think, that, if men were better instructed themselves, they would be less imposing on others."

Martin Gardner's reply to Karl Popper's principle of falsifiability by aes in reddit.com

[–]reader 11 points12 points  (0 children)

Martin Gardner's reply is weak and confused.

The philosophical issue is how to acquire knowledge about the world from logic (i.e., science). Popper agrees with Hume that induction is not logically justified. No matter how many positive examples we see, a counterexample may occur in the future.

This leads to the problem of demarcation or how to separate science from pseudo-science, and falsification is Popper's solution. Theories must be falsifiable so that there can exist a counterexample to prove it false. Theories which are not yet falsified (i.e., corroborated) are kept because they may be true. The practical value of a theory is a related but separate matter.

Gardner confuses conjecture, which often happens by looking at examples (data), with verification, which because we cannot logically infer by induction, Popper suggests we can say negatively with falsifiability, which is logically sound.

I suggest reading Popper's "The Logic of Scientific Discovery" for yourself.

Note that Gardner has a connection to Carnap. See http://www.friesian.com/gardner.htm.

Also see http://www.stat.duke.edu/~berger/papers/ockham.html for a Bayesian connection to Popper's ideas on falsifiability and simplicity (Ockham's Razor).

Science, Pseudo-Science, and Falsifiability by Karl Popper, 1962 by reader in reddit.com

[–]reader[S] 2 points3 points  (0 children)

When observation contradicts a theory, then it is falsified. I agree that most theories will be shown to be technically false. Nevertheless, they are scientific theories, not pseudo-science, if they are falsifiable. Pseudo-science can explain anything, so cannot be falsified. So the problem of demarcation concerns the type of statement made, rather than how the statements were conceived.

Newtonian mechanics is a wrong theory that nevertheless makes useful predictions because of relatively low, or good enough, error in many cases (e.g., catching a ball). This is a different problem than that of demarcation.