Is there a provable way which applies to other humans? We are either generalizing from personal experience or using biological explanations to postulate a connection between behaviour and sentient feelings. So, when a street dog whimpers and runs away as someone bends down to pick a stone, or when it jumps eagerly to eat some food, we deduce pain and pleasure.

There isn't a provable way to know if other animals even exist, including yourself for anyone else, let alone if they experience pain. Positive proofs are tricky things and we don't have very many of them outside mathematics.

Is there a provable way to know that other animals don't experience pain to begin with?