Please take a look at my sentence:
"You may also noticed that 'conscience' is too an unfamiliar word for them, of which they never make use, and nor do they have any."
In this sentence, "they"s or "them" refer to some people that:
1.They are unfamiliar with the word "conscience".
2.They never make use of the word "conscience".
3.They have no conscience.
So, I would like to ask: Would it be incomprehensible? (and any grammatical mistake?)

"You may also noticed that 'conscience' is too an unfamiliar word for them, of which they never make use, and nor do they have any."
In this sentence, "they"s or "them" refer to some people that:
1.They are unfamiliar with the word "conscience".
2.They never make use of the word "conscience".
3.They have no conscience.
So, I would like to ask: Would it be incomprehensible? (and any grammatical mistake?)
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