the.com/substantiation
The moment a claim stops talking and starts showing receipts.
means The act of backing up an assertion with evidence or proof that makes it credible.
from From Latin substantia, meaning substance — literally giving your claim some actual stuff to stand on instead of hot air.
Legal weightCourts demand it before belief becomes verdict.
Tax flavorThe IRS word for show me the receipts.
Sibling rivalrySubstance proves; substantiation does the proving.