Final answer:
Juror 8 challenges Juror 12's belief about dishonesty being a group characteristic and expresses his disagreement.
Step-by-step explanation:
Juror 8
said to
Juror 12
,
'I do not know that. What a terrible thing for a man to believe! Since when is dishonesty a group characteristic? You have no monopoly on ear.'
Juror 8 is expressing his disbelief and disagreement with Juror 12's belief that dishonesty is a characteristic of a particular group of people. Juror 8 is challenging Juror 12's assumption and asserting that dishonesty is not exclusive to any particular group.