(vulgar, figuratively) A situation in which people (usually men) compete, often over superficial characteristics, to demonstrate their worthiness, power, etc.

(carpentry, literally) One should double-check one's measurements for accuracy before cutting a piece of wood; otherwise it may be necessary to cut again, wasting time and material.

(an expression of) the doctrine that all knowledge is subjective, being derived from observations made by humans, and there can be no objective truth

Alternative form of measure twice and cut once

In adverse circumstances, actions that might have been rejected under other circumstances may become the best choice.

Alternative form of desperate times call for desperate measures