Hi, this is something my sup addressed in my work a while ago. It's a grammaticall thing: concepts can't come together, they do not, as you sup suggests have agency, or, indeed, needs. I'm not ssure how I do it, but it's quite straight forward - just write something like 'in order for 'xyz' to take effect concept 'a' would have to be rejected'. I suggest you privelidge the human a bit more in your thoughts! I think it's a mind set thing. Clearly you were doing ok with this before so just look at what you used to do.