Hume's Guillotine sets up an ethical regress problem

[Coffee Jesus]

The quale word doesn't just express that instance of that quale, it expresses every instance of that quale, so my statement "the sensation of burning is painful" is objectively true as long as the subject experiences burning as I do.

We can infer what other people will perceive as painful or pleasurable before they tell us. This means they are identifying pain and pleasure in the same way as we. They have the same qualia.