Suppose I ask you to multiply two large numbers-say 12,653 and 65,321. How would you get the correct answer? You’d probably use a calculator or the good old multiplication algorithm you learned as a kid. One thing is clear: if you don’t use the correct method, then you’re not guaranteed to get the correct answer.

Suppose now that I ask you to defend some claim that you believe-that I ask you to give me reasons, in other words, to…