apagogic
ˌæpəˈɡɒdʒɪk
Definitions
1. adjective
relating to or using a method of argument or reasoning that proves a point by showing the absurdity of the opposite.
“The apagogic argument used by the philosopher effectively countered the opposing view.”
2. noun
a method of argument or reasoning that proves a point by showing the absurdity of the opposite.
“The apagogic employed by the orator won over the audience’s support.”