Differentia

X = X

It’s obvious.

But obviously not:

X = Y.

So when can we say:

“a difference

makes no difference”?

Can our equations

express a new fact

by elimination

– by reducing the facts

“two into one”

– to restate the reality

and refute the obvious

(that “Y is not X”)

– as when we say:

“mind = brain”?

Mike Laidler