In a sentence from SEP(https://plato.stanford.edu/entries/epiphenomenalism/), I have a problem reading the following sentences:
"Thus, it is easily understood how certain kinds of neural events can be selected for." "Indeed, if neural causes of behavior are selected for, and are sufficient causes, there cannot be any further effect attributed to natural selection."
In the sentence I find the expression 'be selected for', but I don't understand why there should be 'for' in the expression.
In the dictionary I use, 'select for A' means to choose something, 'for A', but I can't find any 'A's in the sentences.
- Is there any other usage with 'be selected for'?
- If not, What was 'for' for in those sentences?