What is the special pleading fallacy?

Applying a rule or standard to everyone else, then exempting yourself (or your favourites) with no relevant justification for the exception.

The pattern: A accepts standard S and holds others to it; A is in the same situation; yet A claims to be exempt — without a good reason. It violates the principle of relevant difference: you can only treat two cases differently if there's a genuinely relevant difference between them.

A manager insists everyone must be at their desk by 9:00 sharp, but rolls in at 10:00 themselves "because I'm busy."

Being busy applies to plenty of staff too, so it's not a relevant difference — it's just an exemption claimed because "it's me." A legitimate exemption generalises: "I'm too ill to cook tonight" excuses you because it would excuse anyone who was ill.

The same fallacy also shows up as moving the goalposts — inventing an ad-hoc exception to rescue a claim the moment it's challenged. A self-styled psychic whose powers vanish under controlled testing, and who explains it away with "the abilities only work if you believe in them," is special-pleading a brand-new condition into existence purely to shield the claim from the disproof.

Tip: Test any claimed exemption by asking "would this reason excuse anyone in the same situation?" If only the special person (or the threatened claim) gets out of it, it's special pleading.

Go deeper:

• yourlogicalfallacyis.com — Special pleading — moving the goalposts / claiming an exemption, in one page.
• Wikipedia — Special pleading — double standards and the principle of relevant difference.