@CrayonDevourer It's a combination of "I don't understand this fully and immediately myself" (without appreciating one's own vast ignorance about MOST things), with happening to catch something spoken or written that's wrong, but SOUNDS sensible (also due to that same ignorance), and thinking, "That sounds reasonable, and it harmonizes with my feelings, so it's probably right."
It's a child's grasp of reality. But also typical of far too many legal adults.
@billwashere I realized sometime back that actual intelligence isn't very relevant to good reasoning. It comes down to good thinking HABITS, which nearly anyone can develop with enough effort and practice. But it doesn't come naturally for most people, and instead must be taught and learned. And the later in life you learn those skills, the more you have to UNlearn to do it.