Well my point was that people often misuse the word opinion. You can't really have an opinion about something objective. For example, you can't have an opinion that 2+2=5, but you can incorrectly believe it to be true. It can be your opinion that the evidence supporting 2+2=5 is very convincing, but again, opinions are subjective, so if there is a right or wrong answer (whether it's known or not), then you can't really have an opinion on it. It's just what you think the answer is, which isn't really an opinion.