The picture is a little frustrating, because as a Ti dom I am pretty sure I have logical thinking by default. I will elaborate: the Ni/Se axis paired with an external judgment function seeks conclusions. Closing the circle.

Observe a problem with Se, envision the best possible solution to said problem with Ni, and execute with Te. ENTJs are very much like this. INTJs are like this too, but Fi plays a larger role.

Ne/Si on the other hand is more like an comparison/association sorting algorithm. The older we get and bigger our Si catalog gets the more numerous connections we can generate with the less and less sensory data over time.

It is called Transcontexual thinking, and Ne doms are the best at it. Though as auxiliary Ne users get older It becomes comparable.