While Tina argues with Mr. Rumpf some of the choices cause him to freeze. Tina can then trigger stuff around.
This is the low-spoiler guide for "Correct conversations with Rumpf" puzzle in Encodya. Unlike in normal walkthrough, you get gradual hints on how to solve the puzzle. Click the big button below to see your first hint. If the hint contains a spoiler, you will be warned about it before clicking.