Two reasons. First, you never have to take our word — verify it yourself with the source-available verifier; the math doesn't care who issued it. Second, a verifier is only credible if it's willing to say FAIL: and we've publicly killed our own strategies — nine published in full, 40+ retracted overall: naming the exact bug (survivorship, lookahead, phantom fills) that fooled each backtest (the ledger). A firm that publishes its own failures is a firm whose passing claims mean something.
Every number above is on the record: every credential · verify one yourself · the vocabulary · all questions.