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Comment by gwd
"The Logic of Real Arguments", by Alec Fisher, has had a pretty big impact on me. He develops a framework and some tools to use when analyzing real-world arguments, including extracting "A and B therefore C" statements, and asking questions like, "How would I know if this were wrong?" Then applies it to a number of passages from famous works. Discussing ideas with people with whom I disagree (at least initially) is both my job (only sometimes thankfully) and my hobby, and this book has allowed me to be a lot more effective in listening and communicating back.