Do not go by revelation;
Do not go by tradition;
Do not go by hearsay;
Do not go on the authority of sacred texts;
Do not go on the grounds of pure logic;
Do not go by a view that seems rational;
Do not go by reflecting on mere appearances;
Do not go along with a considered view because you agree with it;
Do not go along on the grounds that the person is competent;
Do not go along because [thinking] 'the recluse is our teacher'.

when you yourselves know: 'These things are unwholesome, these things are blameworthy; these things are censured by the wise; and when undertaken and observed, these things lead to harm and ill, abandon them...
, when you know for yourselves: These are wholesome; these things are not blameworthy; these things are praised by the wise; undertaken and observed, these things lead to benefit and happiness, having undertaken them, abide in them.

- Buddha, Kalama Sutra