The Gregundrum / Figure 2

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Dinesh ^club

Suppose you were to come across a solid wooden object that looked just like the object, Penrose’s “impossible triangle.” en.wikipedia.org/wiki/Penrose_triangle Certainly, it would seem to be a physical impossibility. Yet no one would say that just because of what the object looks like you should throw away your physics book and cut loose from everything you know. You would soon realize, of course, that it must be an illusion. And sure enough, if you could only change your view point, you would discover that what you are actually looking at is the curious object shown on the in figure 2. This object was cunningly constructed by the Psychologist Richard Gregory, precisely so that, when it is seen from certain position, it creates the impression of an impossible triangle. This object deserves a name. with Gregory’s permission, I call it the “Gregundrum”.

If you come across the Gregundrum lying on a laboratory bench, without knowing its ‘function,’ I am sure you will never guess that it holds the key to anything interesting. It is certainly not a pretty thing in its own right. Who would have thought that such perfect thing as the Penrose triangle could have such an ugly explanation? Yet, as Sherlock Homes said to Dr. Watson, “When you have eliminated the impossible, whatever remains, however, improbable must be the truth.” ~Page 5

5 years ago.

Dinesh ^club

5 years ago.

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The Gregundrum / Figure 2

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