premise: A balding man in a blue blazer marks in a book at a desk in front of a chalkboard. hypothesis: A man in a suit is teaching a class.
neutral: Just because the man is in a blazer it doesn't mean he is wearing a suit. He may be wearing jeans under his blazer. There is also no evidence he is teaching a class just because he is at the desk in front of a chalkboard. He may just be there to provide a cake break for everyone.