[Sopater]

He lied. Not every tree. Remember? Adam and Eve got kicked out of the garden.

Actually, it says "and every tree, in the which is the fruit of a tree yielding seed". Can you be certain that the tree of the knowledge of good and evil had a fruit that yielded seed? If there were only one such tree, and there was never to be more than one, then no such seed need exist.

[ColdWater]

definition fruit:

The ripened seed-bearing part of a plant when fleshy and edible.

In other words, a “fruit” is any fleshy material covering a seed or seeds. Most fruits, from a horticultural (science of cultivating) perspective, are grown on a woody plant, with the exception of strawberries.

Or you can say, generally a fruit is the edible part of the plant that contains the seeds.