First extract of Richard Dawkins new book.

[Kyuuketsuki]

And I repeat Saer ... show me one thing that is pretty much universally accepted based on pure logic. 1 equals 1 is an assumption that is borne out by the fact that other stuff based on it works, much like the assumption that the universe is real.

If one did not equal one, then the universe would rapidly become nothingness, or oneness. Shown here: 1=2, everything continuously multiplies until everything becomes a single mass. Shown here: 1=.5, everything divides into halves until it reaches the fundamental particles of the universe and disintegrates entirely. Therefore 1 must = 1. This proves why it is true in our universe. Beyond this... this proves why it is true in every universe preceding ours (i.e. Even if someone is playing us as a video game: they too fall under this rule.)

Actually there is some speculation that there must be universes where 1 = 5 ... don't ask me how but I read it somewhere.

Anyway, you never answered my question ... what has philosophy ever proven alone (without empirical testing)?

Kyu