the.com/obvious
The thing everyone sees but only one person is brave enough to say.
means So clear and easily understood that it requires no proof, explanation, or particular cleverness to grasp.
from From Latin obvius, literally lying in the way, from ob viam — meeting you on the road, impossible to step around.
Literal senseStanding in your path, unavoidable.
Hindsight trapThings look obvious only after someone says them.
Math usageMathematicians say obvious to hide skipped proofs.