【原创】Why must the first alphabet of English be capitalized on any occasions？（sign 24 June）

I donot know.

应助达人

This is a rule, and the most of contents in languages are rules made by human-beings.

应助达人

This is a rule，the first lettle should be capitlized in beginning of sentence, paragraph，people's name,title, etc.

just a rule.but i donnot why.

This is called syntax!