Let's put it this way, Pluto is not a planet.
Everyone accepted the fact that Pluto was a planet at one time. Nobody had to believe it because it was factual.
Then one day, in light of new information, Pluto was declassified as a planet.
So henceforth Pluto was no longer regarded as a planet but rather a subclass as a dwarf planet and the solar system was amended.
One group accepted the change and didn't require any belief being new information changed those parameters.
Others however, remained dogged and insisted Pluto was still a planet and disregarded any new information. This group is those who believe Pluto is still a planet. These are the believers.
That's a logical fallacy, equivocation fallacy. Sorry, but that's not how logic works. You don't get to cherry pick when and where the usage of the words, "accept" and "belief/believe" in order to make them suit your argument.
Others didn't require any belief as the new information is sufficient to ammend the view of Pluto as a planet. These are the educated guesses for which belief plays no role.
A rational person's beliefs comes after the facts, not before.
Sorry to break the news to you, but your attempt at painting "belief/believe" as being exclusive to religion and/or religious people has failed. Within the context of this discussion, science is irrelevant. And trying to use science in this discussion as a differential factor did not help your argument at all. Throwing in the word, "science" when it's irrelevant to the discussion, especially when no actual science is being done, is just the same as the "Godit" argument.
Everyone accepted the fact that Pluto was a planet at one time. Nobody had to believe it because it was factual.
Again, you're being irrational and/or dishonest to yourself. You accepting the facts and not believing the facts at the same time is illogical, it's a contradiction. Beliefs can either be based on evidence/facts or not. There are rational beliefs and irrational beliefs. A person doing some critical thinking prior to believing that something is true, usually ends up with having a rational belief. Irrational beliefs are usually based on little to no evidence, no facts, misinformation, and/or illogical reasoning.
A rational person will believe in the existence of the sandwich he/she is eating, but does not believe in the existence of the sandwich in his/her hallucination.