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There is now, freely downloadable, a revised version of the first part of my Introduction to Formal Logic, the scene-setting chapters on informal logic before the book gets formal. So these chapters from the planned second edition explain a few logical ideas like validity, forms of argument, counterexamples, proofs, etc. Beginning students who want a logical helping hand might well find them useful (so please spread the word to any class that might profit).

A small number of very kind readers have made really useful suggestions that have improved these early chapters a lot. I will be posting shortly about how to get to see more chapters, but I though I would make these early chapters available, hot off the laptop.