Falsus in uno, falsus in omnibus

The Latin phrase “Falsus in uno, falsus in omnibus” translates to “False in one thing, false in everything” in English. This phrase is frequently used in legal contexts to suggest that if a person has been found to be dishonest or untruthful in one aspect of a matter, their credibility may be questioned in regard to other aspects as well. Essentially, it implies that a person who has lied or been deceptive in one instance may not be trustworthy in general.