Information icon.svg At All things in moderation, we are currently voting on restrictions on the use of LLMs (chatbots) in RationalWiki. Reminder: you need to have at least 75 edits and to have been registered for at least three months to be eligible to vote.

Negative conclusion from affirmative premises

From RationalWiki
Jump to navigation Jump to search
Cogito ergo sum
Logic and rhetoric
Icon logic.svg
Key articles
General logic
Bad logic

A negative conclusion from affirmative premises (also illicit affirmative) occurs when a categorical syllogism has a negative conclusion, but two affirmative premises.

It is a syllogistical fallacy and a formal fallacy.

Forms[edit]

You commit this fallacy if you use either of the following false syllogisms:

P1: Some A are B.
P2: Some B are C.
C: Some A are not C


P1: Some A are B.
P2: Some B are C.
C: No A are C.

See also[edit]

External links[edit]