Can you explain how you recognize someone’s face? Can you explain how you balance your body and move your feet correctly as you walk? Can you explain how you speak in grammatically correct sentences without consciously thinking about the rules of grammar?
The vast majority of our experiences are fundamentally inexplicable—basically, everything that isn’t part of our internal narrative.
How generative natural language works has been highly debated for over 60 years—there’s certainly no consensus most linguists would agree with. And while we have a pretty good idea how the process of facial recognition works, we know that process isn't conducive to extracting a conventional explanation of how to recognize a particular face. (The best you could do is to make a list of features that would allow someone to eliminate all but one candidate from a small group, but that’s distinct from the process of actually recognizing someone.)