In Consumer Reports’ labs, we design tests that identify which products are the best at what they do. But to find out which ones are also the most reliable and make customers the happiest, we rely on ...

The questionnaire began simply. What, asked Q1, “is her name”? It was followed by Q2: “When was she born?” Then, because witches can be tricky, the questions on this 17th-century form took a tougher ...