 Falsus in uno, falsus in omnibus

"Falsus in uno, falsus in omnibus" is a Latin legal principle that translates to "false in one thing, false in everything." This principle suggests that if a witness is found to be untruthful about one aspect of their testimony, their entire testimony may be deemed unreliable or untrue. This doctrine is often invoked in legal contexts, particularly in jury instructions, to guide jurors in evaluating the credibility of witnesses.