How do you express in english the idea of noticing something

I'm writing an essay, and I'd like to write at the beginning of the text that it is important to notice the ambiguity of the question I'm asked. How can I do that properly in english?

I'm my language, I would have said :

"We remark". Or : "One should notice that..."

thank you!

Solution 1:

"It should be noted that..." is conventionally used in more formal, third-person writing. "Note that" serves almost the same purpose, but is more imperative. Phrasing it as a (strong) suggestion is politer than ordering the reader to notice something, but it's a very subtle connotation that makes no real difference to the meaning of the sentence.