"Reasonably" is an adverb. "Reasonable" is the adjective. A grammarian would know that. Not to mention their nephew in the fifth grade. Also, "grammatitian" i

"Reasonably" is an adverb. "Reasonable" is the adjective. A grammarian would know that. Not to mention their nephew in the fifth grade. Also, "grammatitian" is an irregular word used by people who don't know about "grammarian" and "grammatist", likely because they don't read books and can't be bothered to use a dictionary.