"INTP's like to think". Okay. "ESFJ's care about people". Alright. "ENTJ's make good high level managers". Fantastic. Are they exclusive? Hardly. Nothing you could ever express would be "discrete", presuming you couldn't map out the entire neurological network and ascribe a near infinite level of classifications. The system is inherently subjective for everyone up to and including the key observer.
Having said that, my previous statement is both rationally sound and physically verified in neurology. Sensors are low latency thinkers, intuitors are high latency thinkers. I have a piece written about it if you'd care to read, but if you prefer more accredited authors there are plenty of sports and military analysts that confirm this hypothesis using Jungian/MBTI terms. I have grown up in San Antonio, I've watched the man my entire life, and I can subjectively posit that he is a low-latency thinker without a doubt in my mind. Look at the video. The most excited I've ever seen him become is on the court, and that's after he's gotten an incredibly BS call, and even at that he does little more than bulge his eyes out and crane his neck like a turtle.
So anyways, ISxP. I don't know him personally well-enough to say either, though most people type him ISFP for his cool, collected calmness and caring compassion towards others. I think ISTP's are more showboat-y and quick to temper.