How to sign: the act of validating; finding or testing the truth of something
Similiar / Same: validation, proof
Categories: determination, finding
Within this category: authentication, documentation, monetization, probate
How to sign: additional proof that something that was believed (some fact or hypothesis or theory) is correct
"fossils provided further confirmation of the evolutionary theory";
Similiar / Same: confirmation, verification, check
Categories: cogent evidence, proof
Within this category: bed check, checksum, crosscheck, parity check