I suspect that part of the problem solving process involves remote viewing the solution as it appears at some future point in time.  I'm fortunate to be an INTJ with a very high IQ and spatially giftedness.  I can literally 3D model in my minds eye while staring at a blank screen and then once I'm satisfied with the design I commit it to SolidWorks. Sometimes it feels like I cheating. :?,(reply>), @Jovian I recently turned 59.,(reply>), How old are you? Asking cuz I've never met an old intj.