ɪnfˈɔːɹməli spˈiːkɪŋ, ɐn ɐsˈɛsmənt ɪz ɐ pˈɜːfɛkt beɪˈiːʒən ˌiːkwɪlˈɪbɹiəm ɪf ɪts stɹˈæɾədʒiz ɑːɹ sˈɛnsᵻbəl ɡˈɪvən ɪts bᵻlˈiːfs ænd ɪts bᵻlˈiːfs ɑːɹ kənfˈɜːmd ɔnðɪ ˈaʊtkʌm pˈæθ ɡˈɪvən baɪ ɪts stɹˈæɾədʒiz.
Informally speaking, an assessment is a perfect Bayesian equilibrium if its strategies are sensible given its beliefs and its beliefs are confirmed on the outcome path given by its strategies.