We must understand these few simple facts related to the extreme rarity of contrail formation (they are EXTREMELY rare) so we can explain it those who continue in denial.
Don't be confused by the narrator's continued used of the term "Persistent Contrails". This is simply the name he is choosing to call them. In this video, he exposes them as artificial and not consisting of water vapor, and that is exactly the point we are all making to the public and to the scientific community.
