Crossword clues for Logician's "There!":LOGICIANPro at sound reasoningLOGICIANSAda Lovelace and Charles Babbage, e.g.LOGICIANMr. Spock was oneLOGICIANIf ... then sort of thinkerLOGICIANReasonable person?LOGICIANSpock, notablyLOGICIANHolmes, for oneLEAPLogician's mistakeGODELAustro-Hungarian logician KurtPROOFLogician's projectTREELogician's chartQEDLogician's "Proved!"QEDLogician's "There!"QEDLogician's "ta-da!"OCCAM14th-century logician who used the principle of parsimonyGIVENSWhat logicians begin withGODELLogician who devised the "constructible universe"LEAPLogician's error, maybeERGOLogician's transitionERGOLogician's conjunctionERGOThus, to a logicianQEDLogician's sign-offFALLACYLogician's pitfallAPRIORIWords from a logicianBOOLELogician George with a Moon crater named after himOCCAMLogician who espoused simplicityERGOLogician's "therefore"PRIORIA __: logician's phraseQEDLogician's lettersFOOLPROOFStupid logician's presentation?VENNEnglish logician with a diagram named for himQEDLogician's abbr.ERGOLogician's connectorALANLogician TuringVENNEnglish logician JohnERATLogician's "E," perhapsPRIORIA __: logician's termOCCAMWilliam of __, logician known for his "razor"QEDLogician's proof endingGODELLogician known for "incompleteness theorems"GODELLogician friend of EinsteinIFSOLogician's wordsERATLogician's "E"ERGOLogician's adverbERGOLogician's linkQEDLogician's "as was proven"REASONLogician's assetERGOLogician's "hence"VENNLogician known for overlapping diagramsERGOLogician's "In that case ... "