Here is my own translation of the [Polish version](https://pl.wikipedia.org/wiki/R%C3%B3wnanie_Drake%E2%80%99a#Wsp%C3%B3%C5%82czynniki) of the [Drake equation](https://en.wikipedia.org/wiki/Drake_equation) article in Wikipedia:

> (...) They must provide the right amount of heat. The smaller the star, the less heat it gives and the closer the planet must be until it reaches a limit. After this limit it becomes so bound to the star that **only one part of it will be illuminated** and the other part will remain dark and cold, **which prevents the emergence of life**.

If I am getting the above correctly, if only half of the planet's surface is constantly illuminated and the other half remains in darkness forever, live cannot emerge and support itself _on the entire planet_, not even on the illuminated half.

What factors or reasons causes the above. Up until finding the above I was more than sure that in the presented scenario life is impossible on the dark side only. And can emerge and support itself on the illuminated part.

Does this means that (even ruling out all other factors) live could never exist on Moon, only because of this single fact that it has one half always dark?