Poetry attributed to solon -- (most trustworthy) Aristotle - constitution of the athenians, politics. Plutarch"s life of solon (written in roman period) the later they were written, the less credible they are. Herodotus says solon left athens for 10 years so athenians couldnt put pressure on him to change laws he created. He supposedly visited amasis in egypt and croesus in. Croesus was king of lydia, 560-547 bc. Therefore this is impossible because the dates dont line up. Also coins weren"t minted in his time, which conflicts with a story about him manipulating coins and their worth instead of ridding of debts in athens. Council of 400: his own poetry, though most things that he did was mentioned in his own poetry. it is debated that it even exists. only evidence of it from aristotle and plutarch. isnt even mentioned in. Council of 500 did exist, and is most democratic institutions, made by cleisthenes.