1cogent
convincing; reasonable
2didactic
intended to instruct
3lucid
easily understood; clear
4arbiter
a judge who decides a disputed issue
5exculpate
to free from guilt or blame
6incontrovertible
not able to be denied or disputed
7penitent
expressing remorse for one's misdeeds
8substantiate
support with proof or evidence; verified
9vindicate
to free from blame
10contemptuous
feeling hatred; scornful
11despotic
exercising absolute power, tyrannical
12dictatorial
domineering, oppressively overbearing
13disdain
(n) contempt; scorn (v) to regard or treat with contempt; to look down on
14haughty
arrogant; vainly proud
15imperious
arrogantly domineering or overbearing