Robert T. Carroll, Ph.D.
2. Language and Critical Thinking
7. Sampling and Analogical Reasoning
8. Causal Reasoning
9. Science and Pseudoscience
Answers to Selected Exercises (note ch. 4 graphs are incomplete)
I started The Skeptic's Dictionary website in 1994. It has grown from a few dozen to over 725 entries in 2012. The website has been expanded to include essays, book reviews, a blog, and a newsletter, among other writings.
Unnatural Virtue, a podcast segment on Skepticality featuring short commentaries on critical thinking, skepticism, and science, is archived here.