"It’s entirely possible. In concluding this lengthy dissertation, I have to admit I can’t disprove their existence. My point is simply this: proponents of the “chemtrail” theory have failed to produce a “smoking gun.” There are logical and believable explanations for all the “evidence” I have seen. No truly damning evidence seems to exist – or if it does, it’s lost in a sea of inconclusive theory, conjecture and photos of normal contrails and meteorological events."