Nothing he said was inaccurate and it was not ad hominem. Ad Hominem means: (of an argument or reaction) directed against a person rather than the
position they are maintaining.
His attack was specifically at the persons ability to use photo editing software, which is pertinent to the discussion.
When I first noticed the rock that looks like a carved head , I thought it looked liked the possible carved head was on it's side and the pattern on
the left of the ' rock ' was the hair and we could only see one ' eye ' as the other one may have been corroded . Plus the kneck area had also
been corroded