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.

[EX Q]: 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.
[EX A]: yes

[EX Q]: Question: I understand what the idiom means: as per this question, it means a person or creature unwittingly used as a test for danger, often destructively. I understand why coalmines: as depositories of ancient organic waste, they are particularly prone to methane and carbon monoxide buildup. But why a canary? They are technically exotic, native and (at least originally) endemic to the sub-tropical Canary Islands, which gave them their name. They were also renowned for their singing voice, as found out in this answer, and could presumably be quite expensive. So why would a mining company in Britain and/or America and/or any other English speaking country use such an expensive and exotic bird as a glorified carbon monoxide detector whose sole purpose in life was to suffocate to death? Why wouldn't they use sparrows, or starlings, or some other small songbird native to the area? Are canaries just that easy to breed and keep? Are they super-extra-sensitive to poison gases and thus were the "upscale" model? Were all small, caged songbirds called "canaries" as a matter of course? Or did the modern idiom simply opt for alliteration over historical accuracy? 
Answer: Male canaries will sing all the time when they're alone in the hope of their song attracting a female. In fact, the main reason for them being held in captivity is their incessant song. This makes them ideal for coal mines; you don't have to concentrate on them or watch them. You do your work, register the canary's song as a background noise, and as soon as the background noise stops, you know you're in trouble.
[EX A]: no

[EX Q]: Question: Is there a semantic difference between engine and motor? In some cases, would the use of one or the other word be technically incorrect? 
Answer: I like the definitions provided by WordNet and their definition is the way I've understood the difference: A motor is a machine that converts other forms of energy into mechanical energy and so imparts motion. An engine is a motor that converts thermal energy to mechanical work. wordnetweb.princeton.edu So an engine is a specific type of motor. That's why it's not incorrect to speak of a motorboat, or a motorcar, or a motor speedway, even if the boat or car is clearly powered by combustion. Note that if there's no combustion, there's no engine. Purely electric cars don't have engines. As nouns, motor can also refer to a nonspecific agent that causes motion: "happiness is the aim of all men and the motor of all action", and engine can refer to something used to achieve a purpose: "an engine of change", a railway locomotive, or a machine used in warfare: "medieval engines of war".
[EX A]:
yes