Here is a quote from Personalitypage followed by some random quotes from a google search:
"INTPs value knowledge above all else. Their minds are constantly working to generate new theories, or to prove or disprove existing theories. They approach problems and theories with enthusiasm and skepticism..."
"Have you noticed that INTP's have a very strong, perhaps too strong skeptic filter?"
"Expect INTPs to be skeptical of anything and everything--and yet always willing to explore and improve..."
"Skeptic. Insatiably curious. Difficult to impress. Lover of people. INTP poster child."
I've dealt with this topic here before, and at the time I did not exactly deny being skeptical, I only pointed out that Sensors are even more skeptical.
However, I am now going to qualify my previous statements made a few months ago. If INTPs are skeptical, it is only because they are CRITICAL thinking types. So it's not some kind of instant skepticism. This is the distinction I'm trying to make.
In my EXPERIENCE, most Sensors are automatically skeptical. That of course is not always true, it depends on another factor. These skeptics I have found are also deceivers. The Sensing deceivers will be instantly skeptical but will also be instantly deceptive.
If you're a Sensor and you're not like that, then fine. I'm not talking about you.