INTP wins the day!

Rating: 10/10 (1 August 2005)

This is a movie about characters. "Personalities" come in second.
The architect, an archtypical example of the Myers Briggs INTP type, saves the trial from going into disaster owing to a lack of consideration of key points.
At this point, let me quote Jean Kummerow (et al), famous authors in the subject of this kind of type analysis. It refers to the Henry Fonda character's personality.
"INTPs are known for their quest for logical purity, which motivates them to examine universal truths and principles. They are constantly asking themselves and others the questions 'Why?' and 'Why not?' Clear and quick thinkers, they are able to focus with great intensity on their interests. They appreciate elegance and efficiency in thought processes and require them, even more so, in their own communications. They may be seen as unwilling to accept what everyone else regards as truth. While often low key in outward appearance and approach, the INTP is 'hard as nails' when challenging a truth. INTPs do not like to deal with the obvious. They are at their best in building conceptual models and developing unusual and complex ideas." This is what Juror 8 demonstrates right from the beginning.
Not every INTP exhibits every feature listed above, but enough to get that point across. I recommend you conduct some research into Myers Briggs personality classifications if you are interested in understanding humans from a scientific viewpoint. There are "tons" of stuff on the web about this.
I haven't bothered to fully assess the personalities of the other jurors. But on a second viewing, it could be interesting. We know nothing about the personality of the accused. We don't need to.