Affirmative conclusion from negative premise


 
Name of fallacy Affirmative conclusion from negative premise
Aliases  
Type Deductive Argument, Formal Argument
Description When a categorical syllogism has a positive conclusion, but at least one negative premise.
Example No fish are dogs
and no dogs can fly
therefore all fish can fly 
Form 
Treatment If one of the premises in a syllogism is negative then the conclusion must be negative. The fallacy can be dealt with by restating the conclusion.