Very droll.

But define winning. In many situations, finding the truth is winning.

For example take global warming. Maybe I'm lobbyist for big oil and for me winning means making sure no one takes global warming seriously. But even then knowing the facts is still in my interest. So if I'm amongst fellow lobbyists who I trust it is in my interest to take an open, truth seeking approach. This will help me identify the strong and weak points in my opponents' arguments. It will help in formulating distractionary strategies. Etc. I will just have to make sure no one records the meeting and then leaks it.