[gpapa]

First of all I would be CERTAIN to vote with Scalia and Thomas 99.9% of the time

That would be rather difficult to do since Scalia and Thomas have voted on the same side about 2/3 of the time.

[right centerfield]

According to Wash. Post, 92% is the correlation. Most disagreements (to my often faulty recollection) tend to be that Scalia sometimes takes the Federal DEA) side of issues (siezing property, medical marijuana) whereas Thomas leans more to individual and states rights in some drug and law enforcement cases.