I was mostly referring to INTPs when they are not at their best. Having Ti as their dominant function, they will find themselves wanting to cut off incoming information a lot of the time. Sometimes, the opposite of this occurs when the INTP will actively seek out new information because they don't have the necessary information at hand to solve the problem (or answer a question, or achieve some sort of goal). They don't want to continue in this state forever and will always want to go back to an equilibrium state where information isn't so readily coming in. An INTP in a bad state shows an extreme case of this in which they don't want to take in hardly any information, and the information they do want to take in will be limited to that which reaffirms previously made assumptions or conclusions. They will want to confine themselves to their comfort-zone. I think every INTP must've experienced this bad state sometime in their life. One personality website calls it "being stuck in a rut". Other people say this is a Ti-Si loop. I am undecided on my opinion of the validity of dominant-tertiary loops, btw.
These traits I mentioned also apply to ISTPs, at least to some degree.
An INTP in a good state will take little hesitation in seeking out new information when they need to but also be able to recognize when it is time cut off the flow of incoming information and reflect.
When an INTP does actively seek out new information in a healthy way, they will do so in an "absorb-all" sort of way, being non-selective for the most part.
Notice all of this boils down to whether the INTP is using Ne in a healthy way or an unhealthy way. For the healthy way, the INTP is truly trying to expand their perspective. For the unhealthy way, the INTP is confining themselves to information that either reaffirms their conclusions and assumptions or is within their comfort zone, if they are even seeking out information at all.