pluralization is weird.
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@Felthry You've picked an interesting example, there. "Reflexes" is, as far as I am aware, universally accepted, but "indices" is gradually being replaced by "indexes" in general use.
@terrana I don't think we've ever seen "reflices", which is why I went with that for one of the examples. For the other one, I wanted one that we've seen both forms of frequently.
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a box of kleenices
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