[ MY ORIGINAL WORDS OF WISDOM SERIES ]
The fact is, a human head is a face if you look at it at front but just a bunch of hair if you look at it at the back. Judgments on someone else opinion on ground of difference of observation if facts is also just a mere opinion.
The human mind has a wide spectrum of facts and opinions. Every human being has a unique combination of these two ingredients that marks the identity of the individual. We may not be able to see an individual's unique molecular DNA identity, but as the person speaks and acts, our unique perceptions are able to give the person a unique identity.