Definition and hypothesis in Plato's Meno 1 (I)

There is no amount or quality of evidence such that if that amount or quality is reached, then truth is reached. If, therefore, a proposition must be true in order to constitute knowledge, knowledge is never reached. If certain standards of evidence are satisfied I have the right to say ’I know’, and the right does not depend on how one answers the question whether it is right what I say.