I am having a hard time figuring when to use "that is". For example, for the definition of "interjection", which is correct?
A word or phrase that is used to express emotion or surprise
A word or phrase used to express emotion or surprise
Do they mean the same thing? Is "that is" extraneous in this case?
Another example, for "premise":
Statements that are made to justify or induce a conclusion
Statements made to justify or induce a conclusion
Again, the same or different?