How people invalidate their own arguments, part two.

Here are three more boneheaded moves. For great illustrations of these fallacies, and many others, just listen to a Rush Limbaugh show -- he has fallacies in spades.

Shifting the burden of proof: when the party that has to prove something just asserts that the opposition has to prove or disprove something.
Example: "Disprove my theory that all life was seeded on Earth by a race of highly evolved gym socks!" (the burden of proof is on the person making the original claim, it doesn't rest on those that are skeptical to the idea.)

Appealing to the majority: Attempting to justify one's argument by simply stating that tons of people believe in it.
Example: "Over half of American adults believe that the sun orbits the earth, therefore it must be true."

Composition Fallacy: wrongly drawing a conclusion about a whole entity based on observations about a smaller part of it.
Example: "I knew a Mexican guy, he was really lazy, therefore, all Mexicans are lazy."