If you should hand Mr. Edison a box which you caused to fly open by some concealed device he would infer a spring, and would hunt for it and find it. Now an uncle of mine had an old horse who used to get into the closed lot where the corn-crib was and dishonestly take the corn. I got the punishment myself, as it was supposed that I had heedlessly failed to insert the wooden pin which kept the gate closed. These persistent punishments fatigued me; they also caused me to infer the existence of a culprit, somewhere; so I hid myself and watched the gate. Presently the horse came and pulled the pin out with his teeth and went in. Nobody taught him that; he had observed--then thought it out for himself. His process did not differ from Edison's; he put this and that together and drew an inference--and the peg, too; but I made him sweat for it.

Y.M. It has something of the seeming of thought about it. Still it is not very elaborate. Enlarge.

O.M. Suppose Mr. Edison has been enjoying some one's hospitalities. He comes again by and by, and the house is vacant. He infers that his host has moved. A while afterward, in another town, he sees the man enter a house; he infers that that is the new home, and follows to inquire. Here, now, is the experience of a gull, as related by a naturalist. The scene is a Scotch fishing village where the gulls were kindly treated. This particular gull visited a cottage; was fed; came next day and was fed again; came into the house, next time, and ate with the family; kept on doing this almost daily, thereafter. But, once the gull was away on a journey for a few days, and when it returned the house was vacant. Its friends had removed to a village three miles distant. Several months later it saw the head of the family on the street there, followed him home, entered the house without excuse or apology, and became a daily guest again. Gulls do not rank high mentally, but this one had memory and the reasoning faculty, you see, and applied them Edisonially.

Y.M. Yet it was not an Edison and couldn't be developed into one.

O.M. Perhaps not. Could you?

Y.M. That is neither here nor there. Go on.

O.M. If Edison were in trouble and a stranger helped him out of it and next day he got into the same difficulty again, he would infer the wise thing to do in case he knew the stranger's address. Here is a case of a bird and a stranger as related by a naturalist. An Englishman saw a bird flying around about his dog's head, down in the grounds, and uttering cries of distress. He went there to see about it. The dog had a young bird in his mouth--unhurt. The gentleman rescued it and put it on a bush and brought the dog away. Early the next morning the mother bird came for the gentleman, who was sitting on his veranda, and by its maneuvers persuaded him to follow it to a distant part of the grounds--flying a little way in front of him and waiting for him to catch up, and so on; and keeping to the winding path, too, instead of flying the near way across lots. The distance covered was four hundred yards. The same dog was the culprit; he had the young bird again, and once more he had to give it up. Now the mother bird had reasoned it all out: since the stranger had helped her once, she inferred that he would do it again; she knew where to find him, and she went upon her errand with confidence. Her mental processes were what Edison's would have been. She put this and that together--and that is all that thought IS--and out of them built her logical arrangement of inferences. Edison couldn't have done it any better himself.

Y.M. Do you believe that many of the dumb animals can think?

O.M. Yes--the elephant, the monkey, the horse, the dog, the parrot, the macaw, the mocking-bird, and many others. The elephant whose mate fell into a pit, and who dumped dirt and rubbish into the pit till bottom was raised high enough to enable the captive to step out, was equipped with the reasoning quality. I conceive that all animals that can learn things through teaching and drilling have to know how to observe, and put this and that together and draw an inference--the process of thinking. Could you teach an idiot of manuals of arms, and to advance, retreat, and go through complex field maneuvers at the word of command?


Mark Twain
Classic Literature Library

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