A summary is a brief statement or restatement of main points, esp. as a conclusion to a work: a summary of a chapter. A brief is a concise statement, usu. of the main points of a legal case: The attorney filed a brief.
As far as I know it's ungrammatical to use the verb form "seeing" when perception is involved - do you mean specifically the gerund seeing, or any use of to see? Either way, it sounds wrong to this US English speaker: we use "seeing" to mean "perceiving" all the time.
grammar - When is it ok to use "seeing"? - English Language Learners ...
I'm seeing exactly what you're trying to do. Move the exactly. Then both are correct. In fact, you can use the present simple or continuous. It depends on your intention.
It felt really nice seeing all the things fall together into place. Vs It felt really nice to see all the things fall together into place. Is this just an infinite- gerund thing? Or are the mean...
They're definitely not interchangeable. If you start saying I am seeing instead of I can see, people will notice you're talking like a foreigner. I can't explain how it works grammatically, but Chandler's use of the continuous here serves to convey the question: "do you the same thing I see?" See here for a similar use of see in the present continuous.
present continuous - "I see" vs. "I am seeing" in the sense of ...
Right now I am looking at the board. I see/am seeing some words on the board. Would you possibly readily or simply tell me which one? And why?