True Democrats don't work to slash Social Security. They don't. Not Ever.

[JoeyT]

101. "People that aren't from Scotland aren't Scotsmen"

isn't a logical fallacy. What you seem to think it means completely negates anyone's ability to define anything. That seems to kind of ruin the ability to argue too.

Generally No True Scotsman is a justification for excluding someone from your group because you don't want to be associated with them for whatever reason, even when they actually fit the definition of being a member of your group. What Manny is doing is actually defining "Democrat" as a person that doesn't want to cut social security. "Not cutting social security" used to be a defining characteristic among Democrats, so it isn't a wild stretch.

If we accept the premise that we can't define Democrat as anything to do with an actual definition, the word becomes arbitrary and meaningless and communication becomes impossible. "Bob is a Democrat" has no meaning, since you can't define "Democrat" as anything, including a person that supports the Democratic party.