Originally Posted by fhall1
I think he's full of it, but can't find any evidence on the net to definitively point him to.
You don't have to. That's not the way proof works.
The person making the claim is the one that needs to provide supporting evidence. I can say, "Cannondales are made in Tibet" and now you're tasked with doing all the work to prove it one way or the other, and all I've done is pull something out of my butt.
If your friend says all those bikes are made by Giant, you should ask to see some supporting evidence. More likely than not, he'll say something like, "I heard/read it somewhere", which is no better than saying the tooth fairy told him.