I believe that mindspawn's complaints about being called a liar are well justified. A friendly reminder about civility from the staff might be helpful. See here Message 342 and here Message 273 and here Message 300.
Sometimes people do lie, but being wrong about something is not slam dunk evidence of such.
Under a government which imprisons any unjustly, the true place for a just man is also in prison. Thoreau: Civil Disobedience (1846)
I believe that a scientist looking at nonscientific problems is just as dumb as the next guy. Richard P. Feynman
If there is no struggle, there is no progress. Those who profess to favor freedom, and deprecate agitation, are men who want crops without plowing up the ground, they want rain without thunder and lightning. Frederick Douglass