Now that you know the differences between facial verification (one-to-one matching) and facial identification (one-to-many matching), you can see why the meaning of the term “facial recognition” needs to be clearly defined when we talk about policy. If we passed a law about facial recognition and defined the term to mean only one-to-one matching, it would not cover instances of facial identification being used for mass surveillance, like during a protest or in a department store. If facial recognition is defined to mean only one-to-many matching, then the law would not cover cases when an
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