"To know what you know, and to know what you do not know. That is true knowledge."
-Confucius

Logic was invented in ancient Greece circa 300 B.C. as a systematic method by which free Greeks could identify deliberate deception and/or errors in reasoning. Niether the Greeks nor, later, the Romans considered it wise to teach logic to common slaves, for obvious reasons. The teaching of classical logic was removed from the US public school system over 150 years ago for exactly the same reasons (check out John Gatto's book"Dumbing Us Down"' his "Ultimate History Lesson" on youtube

Cogent (logical) reasoning, reasoning designed to strongly appeal to the intellect rather than the emotions, should meet three conditions . The greater good is never the same as the truth having the wrong knowledge is worse than ones own ignorance a daily reminder when dealing in the ancient system of reasoning . . It should begin with justified premises (true propositions supported by solid evidence).
It should contain all of the relevant information (the suppression of relevant counterargument/evidence can be a very effective method of deception).
It should come to a valid conclusion (a conclusion which necessarily follows from the premises, is free of contradiction, and consistent with the facts).

If argument meets these three conditions it is said to be both valid and sound (both properly constructed and, having true premises, very likely to be true). When an argument does not meet these conditions it is said to be fallacious (faulty/deceptive reasoning).On the reverse we have LAWS that govern our truth the greater good.Being in the same boat and fishing the wrong side of the boat ? First getting rid of the fear of the Waters and the Boats then the knowledge of psychophysiology or fishing the wrong side .One lifetime and its amusement park.