Grapes are fruit and people don't know they're fruit.

Grapes are fruit and people don't know they're fruit.

Tomatoes are fruit and people do know they're fruit.

Tomatoes are fruit and flies do know they’re fruit.

Tomatoes were fruit and flies do know they’re fruit.

Tomatoes weren't fruit and flies do know they’re fruit.

tomatoes weren’t fruit however flies do know they're fruit

Tomatoes weren’t fruit however flies don't know they're fruit.

Tomatoes weren’t fruit however flies don't know they're not fruit.

This doesn't really make sense anymore....
NEW SENTENCE

Sometimes we humans choose what is worst for us.