What does the use of this punctuation mean?

Question

"[H]ow is the theory..."

I'm referring to the []

Answer 1

those are brackets.

you use those when you are quoting something and is an error from what you are quoting. for example, if a book quoted "how is the theory..." and you put that in your essay, the readers would think you typed an error. so by doing this, "[H]ow is the theory..." the readers would know that you've corrected an error and that you didn't make the mistake.

hope i made my point across. lol

Answer 2

Words or letters may be bracketed when they are changed from an original quote. The bracket delineates the change. For example, you may be quoting someone who has left out a word. You can insert the word if you bracket it to show it was not there in the original. In the case above, the [H] was probably bracketed because in the original it was not there, or in the original it may not have been at the beginning of a sentence. You can also bracket part of a quote to correct spelling.

Answer 3

"    "  The punctuations are marks used to clarify meaning by indicating separation of words into sentences and clauses and phrases........but  (  ) is called bracket  ( or parenthesis), either of two punctuation marks (or) used to enclose textual material............