In Nouns^x, Conditionals^x, Quotation marks^x

. -- I agree that there is often an option; nevertheless, in your sentence, a specific power source is implied-- i.e the power supplied at where 'they' are. .

. Thank you. So if the word is specifically referenced to by context, we should use the definite article to indicate specifcity of it like you did with the noun 'power'. Is that right?-- Yes You wrote this as an introducing part (if that is phrased right) to the examples: I think they...

Thank you. So if the word is specifically referenced to by context, we should use the definite article to indicate specifcity of it like you did with the noun 'power'. Is that right? You wrote this as an introducing part (if that is phrased right) to the examples: I think they are...