Yea, definitely read the whole thing. The risk/reward of not reading both statements isn't worth it. By saving 15-20 seconds you are sacrificing the context that may be necessary to fully understanding the second author's response.
... the argument only within the context of the government policies in ... specific only to the stimulus' context. plus the government responsibility is ...
Sorry to hear you're struggling with NA!
I wouldn't ignore the stimulus completely. BUT when I do see a context indicator I make sure to note where it context is and where the argument is.... skim the context and get right into the question.
So I guess it's a mistake to just look for indicator words. Should first look at their context in relation to the sentence. As sometimes they are not activated. Yes?
In a nutshell, I would say yes. The above words all share the core definition common with "only". I think a lot of it would depend on context of the argument and statement. Do you have an example?