No...there is a such thing...and I would suggest every liberal gets one. A PET scan (Positron Emission Tomography) looks at images and function (so...in the libtard...it would show them their LACK thereof).
They are used a lot for cancers...but also for finding DEMENTIA. So...we might have a "LOUSY FREEPER TROLL!!!!" alert. Could have been a subtle slam...lost on the dummie crowd. LOL! :-)
I also detected a faint sniff of a LOUSY FREEPER TROLL there.