instruction:
Given the Question and Answer pair, detect whether the answer is acceptable or not. Denote acceptable answer as "yes", otherwise denote as "no". An acceptable answer is consistent with the context in question, detailed, long, and uses general knowledge of English. Answers that are not definite and suggest a variety of options are not acceptable answers.
question:
Question: Possible Duplicate: Which is correct to say: "It's me" or "It's I"? Tonight I watched a movie (The Gospel of John) in which Jesus said (as quoted from the written Gospel of John), "It is I." How does this expression differ from "It is me?"
Answer: "It is me" is ungrammatical. Transitive verbs, like speak take a subject and an object. Thus, You (subject) will speak to me. (object) The verb to be is not transitive, but copular. It takes a subject and predicate. Thus, It (subject) is I. (predicate) Also, it must be We'll soon find out who (subject) is who (predicate.) rather than We'll soon find out who (subject) is whom (object.) Edit: Please see @krubo's excellent answer below. Edit: RegDwight is right that "It is I" is very formal for speech, and few people talk like this anymore.
answer:
no

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Question: I was writing something along "... I could only read upto page 34" when my spell-check app Grammarly complained that I should rather use "up to". So, what's the difference between the two and is there really any difference? Or is it that the condensation "upto" is not technically allowed?
Answer: Upto is a misspelling of up to. -- Wiktionary Use up to with a space between the two words. Also, as Yosef Baskin says: You can use the following self-test: Does the single word say something different from the two words? If not, stay with two words. By contrast, into and onto do mean things other than in to and on to, so they work as single words.
answer:
yes

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Question: I'm wondering which one of these expressions is correct? This stuff or these stuff?
Answer: In your expressions, stuff is a noun and is uncountable. I would say it is "this stuff". The only time I can think of stuff being plural is when it is a verbas in he stuffs the turkey with .
answer:
no