A double date is when two couples go out together. Usually that involves four people. A blind date is when you go on a date with someone you haven't met before. A double blind study is an experiment in which neither the subjects nor those administering the test know which subjects get the factor being tested and which get the placebo. Together they make enough puns to fill a complete comic. This is the latest comic from It's The Tie. You'll find a bonus panel at the site. -via reddit