Comment: I am curious. as a tech I need to know the meaning of words,

and it irritates me when people call it a relay board, as it forces me to ask what kind.
is China today. what you are teaching? or has it become something else and the sign still says communist?
in your sons world, people think our national debt is owed to China. if you don't believe this, just ask people who they think it is owed to.
I am willing to bet that if I asked BOTH of you what "capital" was.
I would not get what the man who coined the word said it was.
the man was Karl marx if I am not mistaken.
what you are trying to teach is a concept. Americans today stumble and fight over the meaning of words.
if you did not correctly define what "capital" is.
then you need to make peace with your son.
care to take a shot at it?
it is the "means of production"
"money" can be anything people agree that it is or are forced to use.
Money is not capital.
peace.