pronouns
I was spotting errors on a site But this one problem confuses me
You can get all the information that you want in this book.
The error was show to be "that."
So, the correct sentence was this:
You can get all the information you want in this book.
Was "that" wrongly used there?
Impersonal you is less formal than impersonal one. One should avoid it in formal conversations:
informal — If you aren’t choosing a proper impersonal pronoun when talking to people you don't know, you will have problems;
formal — If one isn’t choosing a proper impersonal pronoun when talking to people they don't know, they will have problems;
Also, don't forget that many languages don't have impersonal pronouns. The non-native speakers may be confused with that, especially if you are discussing someone's bad behavior, diseases, accidents, etc.
Nevertheless, impersonal "you" is becoming more popular recently, so don't hesitate using it if you know your audience.
I will try to apply the rules she gives.
Since the entire whoever/whomever clause is not the subject of a verb that follows it, we cannot apply rule 2. We look to rule 1.
Rule 1 says that the presence of whoever/whomever indicates a dependent clause. This is that clause
whoever/whomever you are sure can't get by without it
Whoever/whomever must agree with the verb in that dependent clause, regardless of the rest of the sentence.
whoever/whomever
you are surecan't get by without it
I remove "you are sure" because it does not affect subject-verb agreement because you are not the one who can or cannot get by with out the money.
whoever/whomever can't get by without it
I apply the he/him rule.
he can't get by without it.
He = whoever, so I believe the answer is whoever,.
Best Answer
As a native speaker, I would say there is no difference, "that" certainly gets used in those types of situations
the that is optional which is probably why it's marked as an error since that can be dropped without lose of meaning.