Science, however, is not just a matter of making mistakes, but of making mistakes in public. Making mistakes for all to see, in the hopes of getting the others to help with the corrections.

— Daniel C. Dennett

Some philosophers can't bear to say simple things, like "Suppose a dog bites a man." They feel obliged instead to say, "Suppose a dog d bites a man m at time t," thereby demonstrating their unshakable commitment to logical rigor, even though they don't go on to manipulate any formulae involving d, m, and t.

— Daniel C. Dennett

Some years ago, there was a lovely philosopher of science and journalist in Italy named Giulio Fiorella, and he did an interview with me. And I don’t know if he wrote it or not, but the headline in Corriere della Sera when it was published was "SI, Abbas UN'anima. Ma è fatty DI anti piccolo robot – "Yes, we have a soul, but it’s made of lots of tiny robots." And I thought, exactly. That’s the view. Yes, we have a soul, but in what sense? In the sense that our brains, unlike the brains even of dogs and cats and chimpanzees and dolphins, our brains have functional structures that give our brains powers that no other brains have - powers of look-ahead, primarily. We can understand our position in the world, we can see the future, we can understand where we came from. We know that we’re here. No buffalo knows it’s a buffalo, but we jolly well know that we’re members of Homo sapiens, and it’s the knowledge that we have and the can-do, our capacity to think ahead and to reflect and to evaluate and to evaluate our evaluations, and evaluate the grounds for our evaluations. It’s this expandable capacity to represent reasons that we have that gives us a soul. But what’s it made of? It’s made of neurons. It’s made of lots of tiny robots. And we can actually explain the structure and operation of that kind of soul, whereas an eternal, immortal, immaterial soul is just a metaphysical rug under which you sweep your embarrassment for not having any explanation.

— Daniel C. Dennett

That's a rhetorical question, and trying to answer rhetorical questions instead of being cowed by them is a good habit to cultivate.

— Daniel C. Dennett

The fundamental core of contemporary Darwinism, the theory of DNA-based reproduction and evolution, is now beyond dispute among scientists. It demonstrates its power every day, contributing crucially to the explanation of planet-sized facts of geology and meteorology, through middle-sized facts of ecology and agronomy, down to the latest microscopic facts of genetic engineering. It unifies all biology and the history of our planet into a single grand story. Like Gulliver tied down in Lilliput, it is unbridgeable, not because of someone or two huge chains of argument that might–hope against hope–have weak links in them, but because it is securely tied by hundreds of thousands of threads of evidence anchoring it to virtually every other field of knowledge. New discoveries may conceivably lead to dramatic, even 'revolutionary' shifts in the Darwinian theory, but the hope that it will be 'refuted' by some shattering breakthrough is about as reasonable as the hope that we will return to a geocentric vision and discard Copernicus.

— Daniel C. Dennett

There is a species of primate in South America more gregarious than most other mammals, with a curious behavior. The members of this species often gather in groups, large and small, and in the course of their mutual chattering, under a wide variety of circumstances, they are induced to engage in bouts of involuntary, convulsive respiration, a sort of loud, helpless, mutually reinforcing group panting that sometimes is so severe as to incapacitate them. Far from being aversive, however, these attacks seem to be sought out by most members of the species, some of whom even appear to be addicted to them....the species in Homo sapiens (which does indeed inhabit South America, among other places), and the behavior is laughter.

— Daniel C. Dennett

The secret of happiness: Find something more important than you are and dedicate your life to it.

— Daniel C. Dennett

This 'web of discourses' as Robyn called it...is as much a biological product as any of the other constructions to be found in the animal world. (Clothes too, are part of the extended phenotype of Homo Sapiens almost every niche inhabited by that species. An illustrated encyclopedia of zoology should no more picture Homo Sapiens naked than it should picture URSS acts-the black bear-wearing a clown suit and riding a bicycle.

— Daniel C. Dennett

Those who feel guilty contemplating "betraying" the tradition they love by acknowledging their disapproval of elements within it should reflect on the fact that the very tradition to which they are so loyal—the "eternal" tradition introduced to them in their youth—is in fact the evolved product of many adjustments firmly but delicately made by earlier lovers of the same tradition.

— Daniel C. Dennett

To put it bluntly but fairly, anyone today who doubts that the variety of life on this planet was produced by a process of evolution is simply ignorant—inexcusably ignorant, in a world where three out of four people have learned to read and write.

— Daniel C. Dennett