Recently a friend of mine identified a crack on his bike frame.
He tried to solve it thru warranty but after tons of emails trying to prove that it was a manufacture issue, they came with a internal picture and said that the crack happened due to an external impact.
Based on only one pic....
I’ve attached the pic bellow. So I’m wondering, looking at it, can you assume it suffered an external impact?
If anyone can help us, please get back to me.
All the best.
Lucas.

Pretty hard to determine based on that. It does look like the laminate has possibly been crushed inwards, but I'm no expert. It is also right next to a seam, which for me could indicate a manufacturing issue.

My gut response to that image based on my experience is that it was an external impact. but as I said, I'm no expert on laminate failure, so could be wrong.