Wikipedia:Liar liar pants on fire

Calling editors liars
Example:
 * Keep Evidence supports that the subject is notable. Keeper  04:01, 4 April 2004 (UTC)
 * Delete You're just making that up! LiarLiar  04:15, 4 April 2004 (UTC)
 * Delete I don't think these sources are reliable or substantial. SourceSkeptic  04:51, 4 April 2004 (UTC)
 * Keep Actually they're more than enough by any honest interpretation of notability. BeHonest  05:03, 4 April 2004 (UTC)

Simply calling another editor a "liar" (which is a personal attack) or even stating that the editor is incorrect is not a reason to keep or delete any article on Wikipedia. If the editor is incorrectly quoting, misapplying information, misinterpreting data, or otherwise simply misinformed, a useful response is to provide a reference to the correct information.

If an editor makes a statement and holds it out as a fact without proper sourcing, it is more than fair to ask for sources. At the same time, it is best to always assume good faith among your fellow editors.