doxa was fragile and unstable (sphalera kai abebaios); it would only sustain precarious positions. Functionally speaking, doxa was subjected to Peithô, which could substitute one doxa for another.
Detienne demonstrates that in sophistic and rhetorical thought doxa is constitutively unstable and subject to persuasive substitution, placing it in the semantic field of apate and ambiguity rather than aletheia.
, The Masters of Truth in Archaic Greece, 1996thesis