actually,
"I think person A is terrible and you shouldn't hire them"
IS slander and/or libel - you are telling someone else how to hire (or not) and your opinion of their character is not the same as your opinion of their work
No, sorry to say it's not slander. .
Just to be clear, yes it IS slander. The minute you say "you shouldn't hire them" you have overstepped your bounds. Saying the person is terrible can be construed as slander without anything backing it up, and beyond being a bad way to chat abt someone, suggests that your opinion is colored by an emotional reponse that has nothing to do with their job capabilities, since it is a subjective statement and not substantiated.
Perhaps we should visit the definition of "Slander" as per webster's dictionary.
Slander:
"a false and defamatory oral statement about a person"
The use of the conjunction "and" implies that for something to be slanderous it must be:
a) false
b) defamatory
If either of these are criteria are not met, it's not possible for a statement to be slanderous.
Saying "You shouldn't hire this person" is not false at all, it's not even a fact that can be proven false and therefore is not slanderous.
It's unfortunate that you fail to understand the definition of slander.