The difference is that existing programs require the user to correct each word individually from a drop-down list of alternatives, or else to retype or reutter the words.

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For example, if someone always preferred to spell "thanks" as "thx, " SwiftKey 3 would learn this behavior and add "thx" in as a word rather than continuously trying to correct it.

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If I change even just one word, people come up to me and try to correct the mistake.

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The leap might be akin to going from having to correct articles with Wite-Out to editing them onscreen with a word processor.

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We were using typewriters, where the state of the art way to correct a typo was to backspace and put a strip of white paper behind the key and retype the word.

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