In most sciences one generation tears down what another has built and what one has established another undoes. In mathematics alone each generations adds a new story to the old structure. – Hermann Hankel
Not… what opinions are held, but… how they are held: instead of being held dogmatically, [liberal] opinions are held tentatively, and with a consciousness that new evidence may at any moment lead to their abandonment. – Bertrand Russell, Unpopular Essays, 1950
![[G]eometry is not true, it is advantageous. - Henri Poincaré](/quote/eometry-true-advantageous.jpg "[G]eometry is not true, it is advantageous. - Henri Poincaré")
