[Goladus]

funny but just in case anyone takes it literally, "yeah, right" requires some contextual indication of sarcasm to be negative. The same words could be uttered as an expression of impatient agreement rather than disagreement, and most positives can be turned negative with additional context.

This is different from the English double negative which is an application of context-free logic to a statement.

[SmellyGeekBoy]

Indeed. This joke doesn't really work written down- it's absolutely possible to say "yeah, right" in an entirely positive way. It's the sarcastic tone when spoken that makes it negative.