Fact 1: Ravneet said, "Mehar and I both have goats."
Fact 2: Mehar said, "I don't have a goat."
Fact 3: Ravneet always tells the truth, but Mehar sometimes lies.
If the three statements are facts, which of the following statements must also be facts?
I. Mehar has a goat
II. Ravneet has a goat
III. Mehar is lying.