That's sure a funny request for evidence. You're appeal to demonstrate the "two party system" is the widespread acceptance of the lie?
Well gee, while we're on that, can you tell me the last time a woman was President of the United States? Was it before your time? I guess we have a male system!
Well, give me ANY evidence that we're more than a two party system?
You can't just claim something is a lie and then not back your claim and expect people to accept your word. If I said it was a lie that only men have been president... you'd expect me to name a few women who have been president, or at least one... otherwise, the statement is false.
So tell us about the time when more than two parties were dominant in American politics? If you cannot do that, then it's not a lie that we're a two party system. Now, you might not LIKE that we're a two party system... you might WISH we weren't a two party system... you might want us to be MORE than a two party system... I understand all that. But to sit here and claim that's a lie is a bit bold for someone who has nothing to offer as evidence.