Gödel, Escher, Bach An Eternal Golden Braid by Douglas R. Hofstadter

~ , : J '< ti \";H \ .. ~':~j FIGURE 102. Viral infection begins when ,Jiral DNA enters a bacterium. Bacterial DNA is disrupt ...

Tail I I I I I '+' FIGURE 103. The morphogenetic path- way of the T4 virus has three principal branches leading independently to ...

13 mm. 25 mm. First complete replica of T4 invader is pro- duced. Lysozyme (a protein) attacks host cell wall, breaking open the ...

mechanisms for examining whether DNA is labeled or not, then the label may make all the difference in the world. In particular, ...

(By the way, can you spot how this sentence differs from -G?) The reason I show it explicitly is to point out that a Henkin sent ...

themselves. Sometimes, enzymes may be needed-but in such cases, they are recruited from the host cell, and enslaved. This is wha ...

bird, or hunting instincts into the brain of a dog? In short, how is it that merely by dictating which proteins are to be produc ...

prevented from being transcribed, which means that a whole set of related enzymes remains unsynthesized. What about positive fee ...

Two Simple Examples of Differentiation The process by which one initial cell replicates over and over, giving rise to a myriad o ...

novel features. We have seen, in the Central Dogmap, that although we can try to draw a clear line between program and data, the ...

comfortable in mixing levels which we tend to see as quite distinct. Actually, in computer science there is already a visible te ...

The Magnijicrab, Indeed It is spring, and the Tortoise and Achilles are taking a Sunday promenade in the woods together. They ha ...

...

Crab: Well, it was this way. This fellow Najunamar had apparently never had any formal training in mathematics, but had instead ...

"Which is the more likely: a charlatan of such extraordinary ingenuity, or a mathematician of great genius?" And before long, I ...

Crab: I don't understand. What statement of number theory? Achilles: "Zero is not the successor of any natural number." Right th ...

The Crab takes it, looks it over for a moment, then sets it in his music holder, and pipes.) Crab: Why, that's quite nice, Achil ...

and further attempts to improve it will in fact destroy it. Such is the case in this example. Your idea of incorporating both of ...

The Crab looks very startled.) You really want me to play that-that-that whatever-it-is? Achilles: Oh, please do! (So the Crab p ...

numbers-such as the square root of 2-which are not ratios of inte- gers. And thus the discovery was deeply disturbing to the Pyt ...