edward2000 - MemberWait a minute, so some people think that if a wheelset was described as tubeless, they would expect it come with a tube? Seriously? How would you describe a wheelset which doesn't come with a tube?
I wouldn't expect any new bike to come with tubeless as standard- not everyone likes tubeless. Saying that a wheel is tubeless and a tyre is tubeless doesn't imply that they're set up tubeless- means 2 different things.
Back to the OP, usually I'd just say that's tyres that have been mangled against rocks. But in such a short span, you'd have to work pretty hard to do so much damage so I think you can't rule out defects. But I do think it'll be impossible to prove anything.