"Another striding instance is recorded by the very intelligent traveler regarding a representation of the fall of our first parents, sculptured in the magnificent temple of Ipsambul in Nubia. He says that a very exact representation of Adam and Eve in the Garden of Eden is to be seen in that cave, and that the serpent climbing round the tree is especially delineated, and the whole subject of the tempting of our first parents most accurately exhibited."

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People are said to believe in God, or to disbelieve in Adam and Eve. But in such cases what is believed or disbelieved is that there is an entity answering a certain description. This, which can be believed or disbelieved is quite different from the actual entity (if any) which does answer the description. Thus the matter of belief is, in all cases, different in kind from the matter of sensation or presentation, and error is in no way analogous to hallucination. A hallucination is a fact, not an error; what is erroneous is a judgment based upon it.

— Bertrand Russell