Let’s say that, in 1950, you could buy 10 apples for a dollar. Would you agree that, in 1950, 10 apples were “worth” $1? One dollar’s “worth” of apples was 10 apples?
Now, let’s say today I can buy one apple for one dollar. Would you agree that 1 apple was “worth” one dollar? That one dollar’s “worth” of apples was 1 apple?
Now, if we assume that the “buying power” of a dollar is measured in “how many apples a dollar can buy,” that my current dollar is “worth less” than a 1950 dollar, because it purchases me fewer apples? That the two “dollars” have a different “number of apples I can buy” property?
Yes, in each case I’ve purchased a “dollars worth of apples,” but it’s very much meaningful to define how many apples that is, and track how that changes over time.
And if I cancelled the halfpenny because it wasn’t worth having when it could only buy 1 apple, but right now it takes 12 pennies to buy 1 apple, then perhaps I should have gotten rid of the penny a long time ago. And the nickel. And probably the dime.
Okay, let’s try to break it down for you.
Let’s say that, in 1950, you could buy 10 apples for a dollar. Would you agree that, in 1950, 10 apples were “worth” $1? One dollar’s “worth” of apples was 10 apples?
Now, let’s say today I can buy one apple for one dollar. Would you agree that 1 apple was “worth” one dollar? That one dollar’s “worth” of apples was 1 apple?
Now, if we assume that the “buying power” of a dollar is measured in “how many apples a dollar can buy,” that my current dollar is “worth less” than a 1950 dollar, because it purchases me fewer apples? That the two “dollars” have a different “number of apples I can buy” property?
Yes, in each case I’ve purchased a “dollars worth of apples,” but it’s very much meaningful to define how many apples that is, and track how that changes over time.
And if I cancelled the halfpenny because it wasn’t worth having when it could only buy 1 apple, but right now it takes 12 pennies to buy 1 apple, then perhaps I should have gotten rid of the penny a long time ago. And the nickel. And probably the dime.