I call them platonic thinkers. People who reject that concept of integration[0] and in effect reject reality. Rousseau is perhaps the greatest example, in his own words:

"It is reason which breeds pride and reflection which fortifies it; reason which turns man inward into himself; reason which separates him from everything which troubles or affects him. It is philosophy which isolates a man, and prompts him to say in secret at the sight of another suffering: 'Perish if you will; I am safe.'"

[0]http://www.importanceofphilosophy.com/Epistemology_Integrati...