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.

[Q]: Question: This is similar to a palindrome but, instead of a word/sentence that reads the same forwards and backward, is there a word for words/sentences that read the same right side up and upside-down? See picture below where the word "yeah" is written in cursive:
Answer: Another answer is symmetric, although that's a broader term. More specific: that it has rotational symmetry. Even more specific: symmetric under a 180 rotation, or it has 180 rotational symmetry. A mathematician might say that it has the symmetries of a parallelogram.
[A]: no

[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.
[A]: no

[Q]: Question: The B strings tuned w/ low E 7th fret harmonic-(6th string,7th fret).
Answer: The shorthand w/ is used to mean with. 2 pieces toast w/ gravy Is a shorter way of writing "Two pieces of toast with gravy." The B strings tuned w/ low E 7th fret harmonic-(6th string,7th fret). means "The B strings tuned with low E, 7th fret harmonic . . ." Edited to add: As Denis de Bernardy correctly notes in the comment below, w/o means the opposite: without.
[A]:
yes