If you're going to be so specific about the meaning of the term investment than this is equivalent of saying that when you hide money under the mattress it is not outside the mattress.
His point was that when money is hidden under the mattress it is not serving an important function which would be if it wasn't under the mattress. I disagreed with that and explained how it worked.
I'm not trying to be pedantic, but saving and investments are two distinct activities with distinct economical outcomes. Fruitfully discussing economics on the internet is hard enough as is, deviating from standard meanings of core terms isn't exactly helpful.
Yes and I understand, my point is that savings and investment aren't really qualitatively different activities. Savings are investment in money, and 'Investment' is investment in non-money goods.
But there is a qualitative difference! Storing excess capital into money is "saving". Using this saved capital to buy a car for private use, or videogames, is consumption. Using the money to produce more capital, like buying a machine for work, or even "buying" a degree at a university, is investment. The transformation of money into another store of value or physical thing is is not automatically investment, and the economic results are different.
