It means the context is giving you different clues or hints in order to understand the meaning, but it is not actually stated.
For instance, let's say you are talking to your friend, but he is not really looking at you in the eye, he is constantly yawning and he is also checking his watch. What is the implied meaning here? He is bored. However, he does not say anything, you just imply it out of his behavior.
Implied is something that is not directly indicated, but is suggested. When you eat a meal that you do not like and make a gesture of disgust, it is an example of a situation in which your disgust is implied, even if you do not say it.
He probably pointed out that they looked similar because Stryver asked one of the two accusers after being given the note, if he had ever seen someone that looked like Darnay before. We can infer that it had something to do with their appearance.
And you could have mentioned that this is from "A Tale Of Two Cities"
The purpose could be in rhyme is tells you every school should wear uniform or how bad ways and good ways to tell you about uniforms . I hope this answer is useful if its not sorry ...