> It's not some random commenter that assumed the cronotype though, it's scientists.
However, what is actually known about the human body is often a lot more fuzzy and uncertain than how the popular press, or sometimes scientists, would have use believe. If the second paragraph of the Wikipedia article on the chronotype is to be believed there is plenty of room for believing that environment and habits play a role in your Chronotype as is the case for most behaviours.
> The causes and regulation of chronotypes, including developmental change, individual propensity for a specific chronotype, and flexible versus fixed chronotypes have yet to be determined. However, research is beginning to shed light on these questions, such as the relationship between age and chronotype.
However, what is actually known about the human body is often a lot more fuzzy and uncertain than how the popular press, or sometimes scientists, would have use believe. If the second paragraph of the Wikipedia article on the chronotype is to be believed there is plenty of room for believing that environment and habits play a role in your Chronotype as is the case for most behaviours.
> The causes and regulation of chronotypes, including developmental change, individual propensity for a specific chronotype, and flexible versus fixed chronotypes have yet to be determined. However, research is beginning to shed light on these questions, such as the relationship between age and chronotype.
https://en.wikipedia.org/wiki/Chronotype