第一人称单数的代词I大写这个问题在语言学中是有共识的。《巴恩哈特语源学辞典》(The Barnhart Dictionary of Etymology ,W H. W. Wilson,1988)中就有这样的解释:
"The pronoun 'I' developed from the unstressed form of Old English (about 725) ic singular pronoun of the first person (nominative case). Modern and Middle English I developed from earlier i in the stressed position. I came to be written with a capital letter thereby making it a distinct word and avoiding misreading handwritten manuscripts. In the northern and midland dialects of England the capitalized form I appeared about 1250."
也就是说,在古英语中“我”最初是用ic两个字母来表示,逐渐演变成为单个字母i。一旦成为单个字母i的时候就出现了一个问题,i这个小写的词在手写体中很容易与前后的词混淆,所以大约在1250年起英格兰中部和北部的方言中就开始使用大写的I。《莫里斯字词源词典》(Morris Dictionary of Word and Phrase Origins)也指出,把I(我)大写与ego(自我意识)无关,只是为了避免混淆和错误(the reason for the capital I is simply to avoid confusion and error)。