Nick666 said:
Well I hope you do realize that you started with money is a promissory note, money is a model, money is what you can exchange it with, money is a representation, and now you've ended up with money is a number. And you yourself changed that number from 5 to 4 just like that. In math that would be 4=5 . Economics is mostly about human minds, psychology, the laws in it are a result of human behaviour, they arent natural laws, it isn't physics, math is just a tool.
My 2 cents
I'm not sure where the inconsistency is.
Numbers are used to represent things. For example, if I have 3 apples (as distinct from 5 apples or any other number of apples) I can represent that distinction by using the number 3. The number 3, in itself, is a representation (in my head, or written on paper, or in a computer spreadsheet) that represents the number of apples I have. It is called a "value" to distinguish it from any algebraic notation (such as "a") that I might otherwise use to represent the number of apples I have. Had I used algebra, such as "a", I could then say (looking at my apples) that "the value of a is 3".
If I change the number of apples I have from 3 to 4, I could then say the value of a is 4.
The representation (a=4) refers back to that which is being represented: the number of apples I have.
I didn't say that money was a promissory note - but I am agreeing with that proposition - a proposition you yourself first put forward - not me. And indeed paper money was originally understood as just such a thing - the idea being that you would take the note to the bank and exchange it for "real" money. As if the bank note itself wasn't real money - but such misses entirely the bigger picture, and why bank notes are just as much real money, as any coinage for which you might otherwise exchange it. Be it coins, bank notes, plastic cards, bitcoin - it's all more or less the same thing (ignoring the legal system which would make more subtle distinctions). It is a system of representation, for regulating the exchange of otherwise more important things in life (or just complete rubbish for that matter).
Money is like the beads on an abacus. Counting stones for those who might not be able to do arithmetic, and trading stones in lieu of what is otherwise being traded.
Money, like numbers, are next to meaningless in themselves. It is in what money or numbers represent, that the power of money or numbers lie.
I was never arguing that economics was physics. But I was arguing that like physics, economics models a certain type of reality - not the reality that physics finds endlessly fascinating (materials), but a reality nevertheless: what people do in order to live. And one of the principle things they do is exchange things. And one of the principle means by which they facilitate such exchanges is through a rudimentary model of such called money.
The idea that economics is primarily about human minds is incorrect. If I'm starving it's not just some belief I have. It is a reality. If I use my mind to alleviate such hunger it's not simply out of some self-help book I'm reading that I should do that, but more the raw nature of the universe that is inspiring such, putting into play all sorts of chemical signals to say: stop sitting there in your own fantasy world and do something.
To treat this as an illusion is just silly. Try telling the starving that their situation is just in their head.
If the mind comes into play it's because the mind is quite clever. Money is an expression of such cleverness, albeit a very ancient and rudimentary form of such. But it's not a trick. And its something that groups of people or a society develops - not just some genius or despot dreaming it up. It emerges as a solution to problems in an activity that many are engaged in - rather than just one person and their particular activity. Its a way of dealing with certain problems in any exchange. Problems in common to the parties in the exchange. Rules are established. The exchange is important - not that which is used to represent the exchange. And it's out of notions of fairness (funnily enough) that representations of such emerges. To call it a trick is in some ways to assert it be a trick. To risk the very thing one might not actually want it to be.
One might very well end up believing one is a filthy rich, gloating over a trillion nollars sitting under one's mattress, in a pitiful conceit that is breathtaking.
C