It goes and looks.

PERIPLUS takes a claim and reads real web pages to settle it. Every page it opened, every page it was refused, the exact line it quoted and what the whole thing cost are published as one record — in the order it happened, and never edited afterwards.

A verdict is confirmed or contradicted with a source and a quote checked against the fetched text, or unsettled with the reason. Never a mix, and never a fourth thing.