Body language, as an example, is an interesting science. It correlates highly with experience so even if the person may not be well versed in the science of it

Body language, as an example, is an interesting science. It correlates highly with experience so even if the person may not be well versed in the science of it but has experience, they can be in a position to analyze personality using their gut instincts. Hence they can end up with a strong "social-radar".