在古希腊，欧几里得证明了只要认同一小部分基本原理（即公理），人们就能通过演绎推理发现各类全新的数学真理。但数学家们所称的这些早期证明，即便依据逻辑法则推导而来，有时也暗藏未阐明的假设，或是依赖易产生误导的直觉。在这类情况下，证明中细微的漏洞可能被忽略，人们无法绝对确信其正确性。

To lean in or not to lean in. That is a good question. It is the question for many ambitious young women who want to make it big in their career. Basically, if they want to be like the big boys, ...