Truth or Truthiness: Distinguishing Fact from Fiction by Learning to Think Like a Data Scientist is a new book by Howard Wainer that can serve as a manual for how to be a good skeptic.

Wainer is a statistician, formerly with the famous Educational Testing Service, and a professor at the Wharton School of the University of Pennsylvania. He is well known for his work in statistics and data presentation.

You know what "truthiness" is. It is a term coined by Stephen Colbert in 2005 to refer to assertions that are clearly true because of how they look, feel, smell, but that are in fact, not true. But they are truthy. You get the point.

Wainer's book is an exploration of cases that demonstrate the difference between truth and truthiness, with an eye towards training oneself to tell the difference, and in some cases, develop arguments about the true and truthy. Does Fracking really cause earthquakes? Are school children in the US over tested? Is tenure what it is claimed to be? For these and other questions, one needs to have evidence, and to know how to evaluate that evidence.

This is a good book, and it is fun. You can read many of the various chapters independently to follow your own interests. To give you an idea of what is included, here is the table of contents:

Part I. Thinking Like a Data Scientist:

1. How the rule of 72 can provide guidance to advance your wealth, your career and your gas mileage

2. Piano virtuosos and the four-minute mile

3. Happiness and causal inference

4. Causal inference and death

5. Using experiments to answer four vexing questions

6. Causal inferences from observational studies: fracking, injection wells, earthquakes, and Oklahoma

7. Life follows art: gaming the missing data algorithm

Part II. Communicating Like a Data Scientist:

8. On the crucial role of empathy in the design of communications: genetic testing as an example

9. Improving data displays: the media’s, and ours

10. Inside-out plots

11. A century and a half of moral statistics: plotting evidence to affect social policy

12. Waiting for Achilles

13. How much is tenure worth?

14. Detecting cheating badly: if it could have been, it must have been

15. When nothing is not zero: a true saga of missing data, adequate yearly progress, and a Memphis charter school

16. Musing about changes in the SAT: is the college board getting rid of the bulldog?

17. For want of a nail: why worthless subscores may be seriously impeding the progress of western civilization.