oh cool that helps me a lot 'cause I noticed the change in
   myself. I'm 43 - be 44 in a couple of weeks. I always tested
   REALLY close to the INFP / INTP line, but I've been finding I
   can more easily be totally INTP at times. I figured it was years
   and years of practicing managing inner turmoil. Not mastered but
   enough but I do better than I once did. === ?Infp and intp
   appear similar after 35-40 because they catch up with their
   inferior functions and the infp begins to display logic and the
   intp shares their Fe. The Scientist and The Philosopher are
   similar as one seeks Universal Laws and the other Universal
   Truths, but since both are closely connected it's the same path
   began in different directions"