When you talk to Siri, Cortana and Google Now, who’s listening?

I’m starting to enjoy talking to computers. I don’t use speech-to-text all that much because I’m so keyboard-oriented, but I love being able to run a search by voice or ask for last night’s baseball scores. Siri works well for this, though I’m now using Android and am thus in the hands of Google Now, which keeps asking me to re-train it by speaking ‘OK Google’ over and over again. Despite this annoyance, a day rarely passes that I don’t talk to Google Now. Which raises an interesting question. What exactly happens to the things we say to services like these? We learned a few years ago that Apple keeps everything you say to Siri for two years, storing such deathless statements as “Remind me to buy eggs at the…


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