The add-on can be used to compare the typed answer against multiple correct answers.
The possible answers can be separated with the '/' symbol.
For example, if the 'Back' field contains "ans1 / ans2 / ans3" and the typed answer was "ans2", the answer comparison will show "ans2" as correct and the other possible correct answers will be hidden.
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There's also the "Answer Set - Multiple answers for "type in the answer" cards" add-on - https://ankiweb.net/shared/info/1827331674
One of its features is "Missing Alternatives" - https://github.com/scott2000/answerset/blob/main/doc/lenient_validation.md#missing-alternatives
> Sometimes there may be multiple similar words in an answer which are all correct.
> If you separate these words with slashes (/), lenient validation will accept any one of them, and will not mark the missing alternatives as incorrect.
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N. <kelciour@gmail.com>