Intellectual discussion.

Let us have an scintillating debate.

About the whole Syria thing.

Or anticipated moves on the stock market.

Anything is fine, as long as it is a dialogue of the highest most succinct tier of class and status. Though I need not remind you respectful ladies and gentlemen.

Prove that for any compact simple gauge group G, a non-trivial quantum Yang–Mills theory exists on ℝ⁴ and has a mass gap Δ > 0.