No equivalent entry in other lexica. The headword phrase itself, though presumably quoted from somewhere, is unidentifiable, but appears to stem from Epicurean philosophy. For Epicurus, 'evidence' or the 'evident fact' (cf. generally epsilon 1126) is a sort of clear and distinct perception (sometimes the same as a 'presentation' or 'appearance', fantasi/a, which displays what is effectively true, or what is the case). See Epicurus, Principal Doctrine 22; Letter to Herodotus, 48; 52, 71, 82.