Laconic / Strawman Has a Point
aka: The Strawman Strikes Back

The Straw Character makes a better argument than the author intended.
If you closely examine the unabridged version, you can see the logic in their argument.

http://tvtropes.org/pmwiki/pmwiki.php/Laconic/StrawmanHasAPoint?from=Laconic.TheStrawmanStrikesBack