Joke Collection Website - Joke collection - What other examples do you know of "knowing one thing and not knowing the other" but making subjective assumptions, leading to mistakes or making jokes?

What other examples do you know of "knowing one thing and not knowing the other" but making subjective assumptions, leading to mistakes or making jokes?

Once upon a time, there was a Chu man crossing the river, and his sword fell from the boat into the water. He quickly carved a mark on the side of the boat with a knife and said, "This is where my sword fell." After the ship stopped, the man went into the water from where he marked it to look for the sword. The ship has gone a long way, but the sword will not go with it. Isn't it silly to find a sword like this?