I was reading a book with the words
and a smile that tells me that I picked the right one
the two "that" in the sentence makes me uneasy. Is there another term we can use to replace the other?
These are not the same that. They have completely different usages and grammar.
The first one is a relative pronoun, the subject of, and heading the relative clause modifying smile
Since it's the subject, this relative pronoun that is not deletable.
However, the relative pronoun which can be substituted for that, if desired.
The second one is a complementizer, introducing the complement clause
This complementizer that, since it isn't a subject, and doesn't start a sentence, can be deleted