A biologist held out two seeds, one in each hand.

“This seed in my left hand is a future tree. If you plant this seed in a sunny spot on fertile soil and keep it watered it will consume nutrients, water and sunlight and grow into a tree.

“This seed in my right hand is a generative principle. If you place this seed in a sunny spot, on fertile soil and keep the soil watered, through the seed nutrients, water and sunlight will congregate and organize themselves into a huge tree.”

“That I can accept,” said the biologist’s colleague; “but your claim that these seeds come from the two trees of Eden strikes me as unprovable, and, frankly, unscientific.”