Compared to clouds jet contrails are very thin, very even and very small. Of the thousands of contrails I have seen I have never seen one that was unevenly lit from edge to edge. Along the length is another matter. Which you will notice is very evenly lit apart from the ‘bottom most’ point.
>>Of the thousands of contrails I have seen I have never seen one that was unevenly lit from edge to edge. <<
I have. Lots of times. And although they are thin, in the right lighting conditions they can look surprisingly solid. It is all an illusion, of course. Just as one cannot land on a cloud.
Well... I’ve pretty much said my piece. I see an aircraft contrail. Clear as day. There’s dozens of examples of similar contrails, even one the following day in the exact same place.
There’s nothing left to argue, IMHO.