Bisect
In plain terms
A tool that finds the commit that introduced a bug.
Going deeper
git bisect performs a binary search through history, having you test commits to pinpoint where a bug first appeared. It narrows the culprit fast.
Under the hood
Halves the search range each step, finding the offending commit in log(n) tests; can be automated.
Examples
Bug hunting, regression finding, git bisect, root-cause analysis.
Think of it like...
Like a guessing game narrowing down which day a problem started by halving the calendar.