What the deuce is it (the solar system) to me?You say that we go round the sun.If we went round the moon it would not make a pennyworth of difference to me or my work.

• 一个逻辑学家不需亲眼见到或者听说过大西洋或尼加拉契布，他能从一滴水上推测出它有可能存在，所以整个生活就是一条巨大的链条，只要见到其中的一环，整个链条的情况就可推想出来了。