Here's an online course: How to Think: An Introduction to Logic
Speaking of logic, here's a comment on the fallacy of the precautionary principle from one of this morning's links:
... the precautionary principle itself — a framework under which no one would venture outdoors at any time for work or play, as any number of horrors loom, all of which carry probabilities greater than zero. Even indoors, of course, the precautionary principle requires eternal vigilance, as Pravda in its glory days would have put it, as the roof might collapse at any time. I am surprised that the Left has not proposed a requirement that individuals wear hard hats when indoors, a diktat qualitatively identical to seatbelt and motorcycle helmet laws and other such manifestations of nanny-statism.
The precautionary principle, accordingly, is a fundamentally totalitarian construct, as it leads inexorably toward a world in which government dictates which risks are acceptable.
A little risk is good, isn't it? It adds zest to life, the hot sauce. I would never go outdoors without my tin foil hat, however. Never know who might be listening in to my brain waves. Beware of the Thought Police.