Thanks for your reply.
The person I am having this argument with had this to say:
"Again, you've stated that my argument was an arbitrary amount of efficiency is required for survival but that's not my argument. If you asked them whether evolution resulted in capabilities or practices that can be considered efficient in for example our species that may have helped us survive, you'd get an answer relevant to this argument."
I told him that it can result in capabilities or practises that can be considered efficient, but it can also result in capabilities or practises that could be considered inefficient, it goes both ways. Who is right? Is efficiency a criteria?