<p><strong>Noun:</strong></p><ul><li>A deceptive, misleading, or false notion, belief, etc.<ul><li>Example: That the world is flat was at one time a popular fallacy.</li><li>Synonyms: misapprehension, delusion, misconception</li></ul></li><li>A misleading or unsound argument.</li><li>Deceptive, misleading, or false nature; erroneousness.</li><li>Logic: any of various types of erroneous reasoning that render arguments logically unsound.</li><li>Obsolete: deception.</li></ul><p><strong>End of Response</strong></p>