In the face of the questions posed in Augustine, Luther, Rousseau, Thoreau . . . , we are children; we do not know how to go on with them, what ground we may occupy. In this light, philosophy becomes the education of grownups.I am not sure if all my philosophy teachers would accept Cavell's description of their trade. Nor am I much of a grownup. But Cavell's description is surely right insofar as it implies that my teachers were also my educators. For this I will always be grateful to them.Thank you to Anil Gupta. Anil taught me to explore bold and unconventional ideas, to enjoy the intricacies of difficult puzzles, and to never lose sight of all the constraints along the way. He has made an indelible mark on my thinking. The force and clarity of his ideas shaped every part of this essay, and without him it would have never been written. Not only was Anil a philosophical mentor to me, he also educated me in other ways. As a logician, Anil never failed to insist that the variables occurring in my definienda also made their way into my definientia. And as food critics, he and his wife Mukta are responsible for much of my love of Indian food (especially spicy samosas).Thank you to Hilary Putnam. I first met Hilary more than 10 years ago, when I was still working on my B.A. It was out of pure generosity that he agreed to meet me. We have kept in regular touch since. During our long walks around Tel Aviv University and along the city's promenade, Hilary made me a realist and a semantic externalist. He taught me about logic, mathematics, language, metaphysics and even ethics. I cannot imagine philosophy without his ideas. Hilary also instructed me in English poetry, on the correct way of drinking cappuccino (no sugar!), and corrected my pronunciation of "gigabyte". ix Each in his own way, both Anil and Hilary showed me how one can be tender, generous, kind, and personal in doing philosophy. The forthrightness, courage and incisiveness of Ruth Anna, Hilary's wife, are traits I will forever try to emulate. Thank you also to John McDowell, Edouard Machery and Mark Wilson. I treasure every minute I spent with them and their writings. They have always challenged me and pushed me further. By working sometimes with and (to my great distress) sometimes against their ideas, I learnt much about how to philosophize. I admire their thinking immensely. Their books-Mind and World, Doing Without Concepts, and Wandering Significance-are never far from my mind. Other faculty at the University of Pittsburgh and at Carnegie Mellon University also provided me with incrediably helpful lessons and discussions. Thank you especially to Wayne Wu, Thomas Ricketts, Mazviita Chirimuuta, James Shaw, James G. Lennox, and Kenneth F. Schaffner. Thank you also to Christopher Hill, who visited the University of Pittsburgh and delivered an astonishingly illuminating seminar on the Philosophy of Mind. Lady Luck also contributed to my education. A lucky dinner conversation with Bill Brewer changed my mind on the Myth of the Given. Separate encounters with...