Synaptic summation is the technical term used in neurophysiology for those instances in which some neuron C is fired only by a combination of neurons A and B.
“I should like to repeat what I stated recently in the Jeddah Economic Forum in Saudi Arabia: It won't be the religion, but rather the world-view of some of its followers that shall be made current.”
“Most importantly, I agree that the truth of these matters should be determined by interpretation of scientific evidence - experiments, fossil studies and the like.”