Comment: What are they then? How do

(See in situ)

In reply to comment: I just don't believe. (see in situ)

What are they then? How do

What are they then? How do you explain the trails left by planes that linger in the sky's all day???

I'm open to an explanation, but "you're a kook" doesn't logically explain them. (not saying this is what you are saying, just it's the general "official" response)