Stanton's jaw muscles tightened. "I think I'd like it."

Yoritomo shrugged slightly. "Perhaps you would. But it would not be the

asset you think. Look at it soberly, my friend.

"The most difficult teaching job in the universe is the attempt to teach

an organism something it already knows. True? Yes. If a man already knows

the shape of the Earth, it will do you no good to attempt to teach him. If

he _knows_ that the Earth is flat, your contention that it is round will

make no impression whatever. He _knows_, you see. He _knows_.

"Now. Imagine a race with a perfect memory--one which does not fade. A

memory in which each bit of data is as bright and fresh as the moment it

was imprinted, and as readily available as the data stored in a robot's

mind. It is, in effect, a robotic memory.

"If you put false data into the memory bank of a computer--such as telling

it that the square of two is five--you cannot correct the error simply by

telling it that the square of two is four. You must first remove the

erroneous data, not so?

"Very good. Then let us look at the Nipe race, wherever it was spawned in

this universe. Let us look at their race a long time back--when they first

became _Nipe sapiens_. Back when they first developed a true language.

Each child, as it is born or hatched or budded--whatever it is they do--is

taught as rapidly as possible all the things it must know to survive. And

once it is taught a thing, it _knows_. And if it is taught a falsehood,

then it cannot be taught the truth."

"Wouldn't cold reality force a change?" Stanton asked.

"Ah. In some cases, yes. In most, no. Look: Suppose a primordial Nipe runs

across a tiger--or whatever passes for a tiger on their planet. He has

never seen a tiger before, so he does not see that this particular tiger

is old, ill, and weak. He hits it on the head, and it drops dead. He takes

it home for the family to feed on.

"'How did you kill it, Papa?'"

"'I walked up to it, bashed it on the noggin, and it died. That is the way

to kill tigers.'"

Yoritomo smiled. "It is also a good way to kill Nipes. Eh?" He took the

towel and wiped Stanton's brow again.

[Illustration]

"The error," he continued, "was made when Papa Nipe generalized from _one_

tiger to _all_ tigers. If tigers were rare, this bit of lore might be

passed on for many generations. Those who learned that most tigers are

_not_ conquered by walking up to them and hitting them on the noggin

undoubtedly died before they could pass this bit of information on. Then,

one day, a Nipe survived the ordeal. His mind now contained conflicting

information, which must be resolved. He _knows_ that tigers are killed in

this way. He also _knows_ that this one did not die. Plainly, then, _this_

one is not a tiger. Ha! He has the solution!

"What does he tell his children? Why, first he tells them how tigers are

killed. Then he warns them that there is an animal that looks _just like_

a tiger, but is _not_ a tiger. One should not make the mistake of thinking

it _is_ a tiger or one will get badly hurt. Since the only way to tell the

true tiger from the false is to hit it, and since that test may prove

fatal to the Nipe who tries it, it follows that one is better off if one

avoids all animals that look like tigers. You see?"

"Yeah," said Stanton. "Some snarks are boojums."

"Exactly! Thank you for that allusion. I must remember to use it in my

report."

"It seems to me to follow," Stanton said musingly, "that there would be

some things that they'd never learn the truth about, once they'd gotten a

wrong idea in their heads."

"Ah! Indeed. It is precisely that which led me to formulate my theory in

the first place. How else to explain the fact that the Nipe, for all his

technical knowledge, is still in the ancient ritual-taboo stage of

development?"

"A savage?"

Yoritomo smiled. "As to his savagery, I think no one on Earth would

disagree. But they are not the same thing. What I do mean is that the Nipe

is undoubtedly the most superstitious and bigoted being on the face of

this planet."

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