As many of you correctly show that this question can be branched out in many directions, but many of these strike me as unimportant because the fundamental subject is found in behavior and motivation, not semantics.
Everyone internally agrees about everything. They just don't know it because they express themselves through different means.
I believe this is moving towards the crux of the issue!
We share a common reality and truth, that is why something like the scientific method can function. Knowledge is what one knows about this common reality, and intelligence is the manner by which one knows anything.
Humanity as a whole seeks to increase our tribal knowledge. The greatest contributors to this are often those who are the most intelligent, so we place value on intelligence because from intelligence we expect to receive knowledge. It is somewhat of a fallacy because intelligent people are not omniscient and it is not intelligence but the possible byproducts of it that is valuable.
The offense of pseudo-intellectualism is that, whether highly intelligent or not, the focus is on what one stands to gain through appearing intelligent at all times. Because the person appears intelligent we assume they are conveying knowledge and they become valuable to us. Their goal is to become valuable to others whether they are of actual value to us or not.
Truth is contingent on integrity. In my opinion, the irony of the pseudo-intellectual is what makes them the worst offender of cheaters and deceivers. Our intelligence is a manner we can refine, but knowledge still remains the important product. Considering that, we should convey our relative level of knowledge to others as accurately as we can, this prevents us from replacing greater amounts of knowledge with lesser amounts that simply seem like more. Unfortunately it can be difficult to know relatively how little we know, but we should at least start with a concern for such accountability, no?
For those that have asked, the benefit of discussing this is to understand a problem, become more aware of it in ourselves and others, and attempt to refrain. Lots of interesting points, thank you for the input that has been given (and any yet to come) I will certainly ponder this further.