P2. only but (also but only): (a) only, merely; (b) except only. Now poetic. Source: Oxford English Dictionary (login required) Below are some only but examples from the Corpus of Contemporary American English. Swap in only or nothing but for only but to see: Ultimately, there is only but one choice for you, no? To consume the entire pint. TV ...
For Only in the upper class, the only restricts in the inclusion (in, as opposed to out). But no matter which you restrict, there are only two groups under discussion -- upperclass women and and female commoners.
In " Only When ", there is a sense of urgency, a slightly more 'involved' writing. "It was only when" is by comparision more 'relaxed' writing, more like someone is recounting something to someone.
In the first sentence ' only ' has the sense of Solely, merely, exclusively; with no one or nothing more besides; as a single or solitary thing or fact; no more than.
And only one of them mentions its use in scorn or disdain. Also, so far as I can recall, whenever puff is used as a verb to describe some sort of communication, it had a negative connotation, that the speaker was somehow upset. The person who mentions the word " scoff " explains why it does not fit.
I'd use the one with the "not only/but/also" construct: Thanks to his remarkable performance on the SAT, not only was he accepted into Harvard, but he was also given a full scholarship. "not only [fact A] but [fact B]". When you start with "not only" you're indicating that two facts A and B will be presented. Fact A is something that is already good enough (or bad enough) by itself and fact B ...