I believe this all boils down to mental energy an efficiency. Our brains are great at pattern matching. We want to look at the landscape, see that there’s no h

I believe this all boils down to mental energy an efficiency. Our brains are great at pattern matching. We want to look at the landscape, see that there’s no hiding lion, and continue hunting-gathering. Constantly rechecking that there’s no lion is draining, and it also leads to less hunting-gathering. Adult humans really dislike having to do that (we even consider it a sign of mental illness) The “back and forth” between husband and wife supports this theory. Every time one of them designed one experiment, “the ball was on somebody else’s field” and they could temporarily forget about the problem until the results came back. I am sure they were two very busy individuals and being able to “move on to other things” after designing the next experiment was gratifying.