Was Scalia's reasoning sound?
Left or Right, I want a Justice who thinks. Thinking invites surprises.
No.
He engaged in banal rationalizations. He theorized that it would be impossible to distinguish legal medical marijuana from illegal pot.
Which is nonsense - liquor stores around the country have devised ways to track legally-taxed booze.
He IMO did not like medical marijuana. And he set out to find a rationalization to abuse the Interstate Commerce clause and the Necessary and Proper clause.
So yeah, he thought about it. Too damn much, apparently.