I'm 5w6 INFP, which is odd. If you want an example of 5w6, go look through my posts. I quite often go through Descartes logic, spewing it in large paragraphs. Einstein seems to be 5w4. While he uses Ne as well, he doesn't seem to go into Descartes type logic as much, instead using the math his primary tool. The reason I've come up with for why other 5w6s this isn't the case is because they don't have Ne.