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The rejection of an argument on the basis of the character, motives, or identity of the one making it rather than on its logical soundness or the validity of its assumptions.
[Coined by C. S. Lewis in his essay "Bulverism" (1941), from Ezekiel Bulver, a character who realizes the ubiquity of this fallacy at the age of five, invented by Lewis to explain the origin of his coinage.]
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.