When evaluating an Internet site, how do you determine if it is credible? How do you differentiate between truth, lies and opinion? And what about satire? Can you always tell when a site is just joking? Although a complete discussion of these important questions goes beyond the space allotted this column, today’s sites are all examples of pranks, fabrication and satire. A few were specifically created as educational tools. Would you have been fooled by any of them?