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There are 3 types of teachers:
The 4 items mentioned below fall under the 2nd category, "by the way of reasoning".
The other answer also has a good summary of what these items mean.
Upvote:2
From Help! The Kalama Sutta, Help! by Buddhadasa Bhikkhu:
Ma takkahetu: Don’t believe something solely on the grounds of logical reasoning (takka). Logic is merely one branch of knowledge that people use to try to figure out the truth. Takka or Logic is not infallible. If its data or inferences are incorrect, it can go wrong.
Ma nayahetu: Don’t believe or accept something merely because it appears correct on the grounds of Naya or what is now called "philosophy." In Thailand, we translate the Western term philosophy as prajna. Our Indian friends cannot accept this because "naya" is just a point of view or opinion; it isn’t the supreme understanding properly referred to as panya or prajna. Naya or nayaya is merely a method of deductive reasoning based on hypotheses or assumptions. Such reasoning can err when the method or hypothesis is inappropriate.
Ma akaraparivitakkena: Don’t believe or accept something simply because of superficial thinking, that is, because it appeals to what we nowadays call "common sense," which is merely snap judgments based on one’s tendencies of thought. We like to use this approach so much that it becomes habitual. Some careless and boastful philosophers rely on such common sense a great deal and consider themselves clever.
Ma ditthinijjhanakkhantiya: Don’t believe accept something to be true merely because it agrees or fits with one’s preconceived opinions and theories. Personal views can be wrong and our methods of experiment and verification may be inadequate, neither of which lead us to the truth. This approach may seem similar to the scientific method, but can never actually be scientific, as its proofs and experiments are inadequate.