4 ideas
6408 | Russell needed three extra axioms to reduce maths to logic: infinity, choice and reducibility [Grayling] |
6414 | Two propositions might seem self-evident, but contradict one another [Grayling] |
16570 | Elements are found last in dismantling bodies, and first in generating them [Albert of Saxony] |
1422 | God's existence is either necessary or impossible, and no one has shown that the concept of God is contradictory [Malcolm] |