You’re negotiating a deal. What is more likely to influence your judgement?

Interesting fact:

Logic isn’t as dry a subject as you might think: there are great riddles that need to be solved with logic. For example: you’re on your way to Athens when there’s a fork in the road. Next to it, there are two sages, one of whom always lies and one who always tells the truth. You don’t know which is which. What do you have to ask to find out which road leads to Athens?