Because dialects change and languages transform after a while, lines that rhyme inside of a supplied register or period might not rhyme in another, and it will not be very clear whether a person must pronounce the words so they rhyme. An case in point Is that this couplet from https://arthurjvckq.blognody.com/26889940/types-of-rhymes-in-poems-can-be-fun-for-anyone