Definition:Naive Set Theory/Linguistic Note

Linguistic Note on Naive Set Theory
The pronunciation of naïve is in two syllables, approximately nigh-eeve, and means simple in the sense of unsophisticated.

In natural language it is usually used in the sense of lacking worldly wisdom.

The correct rendition of the word naïve is with a diaeresis on the i, that is: ï.

This has the effect of indicating that the pair of letters involved need to be pronounced as separate syllables. Spelt naive, the word would be expected to be pronounced something more like nave.

usually follows what appears to be standard practice, and renders the word with the normal unadorned i, but on occasion the correct form can be seen.