Confusion about the compouding sentences with ‘not to say’

If a sentence is formed like this,

There is a deep ambivalence, not to say hypocrisy, when we notice that ..

I am confused what exactly the author emphasizing. Is he saying, the hypocrisy is obvious but I am highlighting the ambivalence; or is he drawing readers attention to ‘ambivalence’ and asking them not to confuse it with ‘hypocrisy’?

Answer

not to say:

used to introduce a stronger alternative or addition to something already said:

it is easy to become sensitive, not to say paranoid

not to say:

Even; perhaps; almost.

At first Marc was somewhat shocked, then he burst out laughing and finally came to the conclusion that actually it was all rather sad, not to say stupid.

Depending on the context, you could mean that the alternative is definite or simply a good possibility. In the OP’s example, the writer is leaning towards the definite.

Attribution
Source : Link , Question Author : Dilawar , Answer Author : coleopterist

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