Validity : what follows from what? -- Truth functions-- or not? -- Names and quantifiers : is nothing something? -- Descriptions and existence : did the Greeks worship Zeus? -- Self-reference : what is this chapter about? -- Necessity and possibility : what will be must be? -- Conditionals: what's in an if? -- The future and the past : is time real?? -- Identity and change : is anything ever the same? -- Vaguenes : how do you stop sliding down a slippery slope? -- Probability : the strange case of the missing reference class? -- Inverse probability : you can't be indifferent about it! -- Decision theory : great expectations -- A little history and some further reading