one half (variable)(variable) squared

I'm in a physics class right now. It seems like everything in physics involves the same formula:

1/2 * X * Y^2

that is, half the first variable, times the second variable squared. Here's a little contest: I'm going to list formulae that include this system, and let my readers figure them out!

1/2 MR^2
1/2 KX^2
1/2 AT^2
1/2 Iω ^2
1/2 αT^2
1/2 MV^2

PS. what is up with the math lettering system? Using X and Y as the most commonly used letters is insane. It's incredibly easy for an x to look like a y, and vice-versa. W stands for like three things, and so does T. It's like crazy people thought up the notation for physics stuff. Or maybe people with a truncated alphabet.

One May As Well Be a Prime

There's a pedantic insistence that one cannot be a Prime Number. After all, a Prime Number must be divisible by only itself and one. This argument seems to imply that the grammar supersedes mathematical usefulness.

In fact, it doesn't matter whether one is a prime or not, and the distinction is entirely arbitrary. This doesn't stop people from arguing about it heatedly.

The "debate" over one's Prime-ness can be instructive:

Con: "Primes must be divisible by one and itself. Since that implies that one and the number are distinct, one cannot be Prime."

Pro: "One is not divisible by another Integer. Surely it is Prime."

Con: "It must be divisible by two integers! One is..."

And so on

What do we see here? Two arguments which skip past definitions, and jump squarely into the conclusions. Since the debaters haven't agreed on a definition, they could argue all day without producing anything but anger and frustration.

Remember what Voltaire said, "If you would debate me, first define your terms". I can't imagine how many arguments would be instantly resolved by this approach.