I do not agree with your comment regarding the usage of "persons" rather than "people". Persons is used in formal context when you are looking at each person individually. The usage of "persons" is more context based than anything else.
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Sinhmanimy understanding is that " persons" is for either an exact or a small number.Correct. However, 'people' is always correct, so if you want, you can use 'people' even for an exact or a small number. I tend to use 'persons' myself in those cases, but 'people' is also all right.
hrsaneiYou can't go wrong by using persons while you are talking about recipes."Persons" not common in American English.