13 logoi gia na eisai ma8hths: 1)O ma8hths exei dikio.. 2)O ma8hths exei panta dikio.. 3)Se periptwsh pou o ma8hths exei adiko isxuei 1 kai 2.. 4)O ma8hths den xazeuh..sulogizete 5)O ma8hths den koitame..anapauetau 6)0 ma8hths den diavazei periodika