Originally Posted by
labcoat
There are a LOT of differences between ENTp's and INTp's, so if you're either of those types, you should be able to tell which one it is without any trouble.
ENTp's are members of the alpha quadra. They have intensely personal worldviews and can basically accept any kind of idea and begin believing in it religiously. They look at society from a disconnected perspective; they're concerned with their own well-being and that of a very close group of associates.
INTp's are members of the gamma quadra. They have a realistic world-view that is tempered by that of the generally accepted views of society. They are known for their excessive scepticism and for being negatively critical even when this makes them impopular. They are responsible people that don't give in to illusions, but they can be difficult to motivate.
An ENTp might read a newspaper or watch the news only for fun or to talk about the spectacular bits with friends in an informal way. The INTp would be more likely to take a very serious interest in the news and to read every letter of a newspaper, possibly more than once.
INTp's have "fun" by criticizing things. ENTp's have fun by putting stange twists into situations, suggesting that something else is going on than what's immediately evident. (INTj's have fun by vocallizing their socially unacceptable oppinions, at least I and several of my friends do)
In general ENTp's are stereotypically light-hearted, wacky, and a little bit unaware of how their "fun" seeking behavior might be abrasive to others... INTp's are stereotypically serious, sluggish. The stereotype of a "nerd" is INTp.
ENTp's are extroverts... this hardly needs clarification. They're not withdrawn people and they don't have trouble connecting with others. INTp's might have some difficulties in this area.
If you identify with the alpha parts but not with the extroversion, I would not be quick to discount the INTj possibility.