Caution! The organization of this post is stupid and I’m not fixing it.
Specifically the kind with a bunch of pieces you put together. Please don’t mistake this for saying that thal-backs tend to be puzzle enthusiasts- they eventually tend to fixate on very particular activities to the exclusion of most others, and it’s rare that this activity is specifically puzzles. Personally, I think they are unforgivably boring and an egregious waste of time. But if a T-backed guy really got into puzzles, he would probably become the best in the world pretty quickly. This is true for other activities that are like puzzles, and the more puzzle-like the activity is, the more likely it is that a T-back will quickly become very good at it. Furthermore, an unsupervised T-back will approach every activity in a decidedly puzzle-like manner.
This leaves an open question: what sort of environment produces this sort of person? I don’t know whether “cold” accounts for all of it.
The fascination with a particular puzzle-like activity occurs during thal adolescence, roughly from 16-30. This overlaps somewhat with the earlier period (12-25) during which they ought to be learning survival skills. Most importantly, how to do organized violence with a group of tribal males (ideally, both megafauna and other male hominids), though this is dysfunctional in the modern environment (this single-track, task-based shop talk doesn’t mesh well with attention-deficit, deception-based crom socializing, which is learned at the same 12-25 period of life). Since I’m already halfway there, I might as well delineate my intuitions on life trajectory:
0-15: General development, impressionable absorption of broad spectrum of knowledge and skills
12-25: Male peer group development, learning the art and craft of violence (individual and organized)
16-30: Ego development, appearance of singular fascinations and genius
25-30: EITHER courtship and progression to family life OR continued isolation and development of specialized genius (depending on female mating choice, moreso in late-era Amuds and less so in throwback Mousterians)
30-50: General adulthood, child-rearing and provision
50-70: Middle age, legacy-building
>70: Old! Such wisdom, respect your elders :-D. Should be spent writing down life lessons and passing on skills to youngsters.