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Ἓν οἶδα, ὅτι οὐδὲν οἶδα → I know only one thing, that I know nothing | all I know is that I know nothing.
manual: P. and V. βάναυσος, Ar. and P. χειροτεχνικός.
workman: Ar. and P. χειροτέχνης, ὁ, V. χειρῶναξ, ὁ (Soph. and Eur., Fragment).