/lit/ - Literature

Worth pointing out that the book is over 95 years old now and in case you want to catch up on logic (as opposed to the logic in the book, which is the same predicate logic, but super outdated in presentation), I really recommend this book

http://www.cin.ufpe.br/~mlogica/livros/Logic%20and%20Structure%20-%20Van%20Dalen.pdf

The sum on the page is actually just 2^n, via
https://en.wikipedia.org/wiki/Binomial_theorem
and 2^n is the size of the subsets of a set of size n.

E.g.
{a,b,c,d}
has size n=4 and it's subsets are
{}, {a}, {b}, {c}, {d}, {a,b}, {a,c}, ... {b,c,d}, {a,b,c,d}
Well you find that there are 16 subsets, which happens to be 2^n
The sze of subsets of size k are exactly the coefficients in
(x+y)^4 = x^4 + 4 * x^3 * y^1 + 6* x^2 * y^2 + 4 * x^1 * y^3 + y^4
i.e. they are given by the "n choose k" ratio and I suppose Wittgenstein uses a counting argument along those lines on the pages before and here doesn't bother to reduce the sum to just 2^n.

>>13067350
That sounds sad.

What about philosophy students? And I mean the female and non-American ones.