If you don’t know what caused yesterday’s headache, how do you know it didn’t cause today’s headache?

The consensus of doctors has determined what causes today’s headaches. It is the hot weather.

But it wasn’t hot yesterday.

Exactly, that is how we know that whatever caused yesterday’s headache could not have caused today’s headache.

Wouldn’t it make sense to try to find a common cause for both headaches?

Of course not, the consensus of doctors agrees that heat is causing today’s headaches, and it wasn’t hot yesterday. So the two headaches couldn’t have been caused by the same thing.

But my headache is just like yesterday.

Are you an MD? Are you qualified to disagree with me?

Of course not, doctor.