What’s a Type I Error?
Actually, we have four Type I Errors. They definitely belong in the realm of Grammar, but our semicolon vs. comma discussion is an appropriate place for this information.
Punctuation errors are classified based on their severity in creating incorrect sentence structure.
Spelling and usage and spacing errors matter little to sentence structure. Everyone spots these Type III errors and thinks they’re horrible. Nope, the horrible ones are the Type I errors.