Is beer wine?

This is a joke, a story. The joke is as follows:

Police: Have you been drinking?

Ren Lei: No!

Traffic Police: Why does it smell of alcohol?

Ren Lei: I had a beer.

Traffic Police: Beer is also wine!

Ren Lei: Is soy sauce oil?

Traffic police: No.

Ren Lei: Is a snail a cow?

Traffic police: No.

Ren Lei: Is the bride a mother?

Traffic police: No.

Ren Lei: Is beer wine?

Traffic police: No? Ren Lei: That's right.