True - although I suspect that it has not really helped those (not me!) whose primary interest appears to be to decide what is (and is not) 'correct'.Yeah, but we've all learned a little bit more of the language
As I'm always saying, whether in relation to technical terminology or language on general, what matters to me is 'effective communication', not issues of 'correctness'. In that sense, it seems that both forms of words we have been discussing are in fairly common usage, and both generally represent effective communication. It is true that this all started because when SUNRAY wrote using the phraseology I would not use, I thought it was probably a typo - but, even then, that fact that I made that comment meant that I at least thought that I had correctly understood the spirit of what he was saying (i.e. that he agreed with me).
It's certainly true that I have always used 'my wording', seemingly understood by all those I interact with, and would never dream of using 'the other' wording. Since it's easily done with modern technology, last night I had a quick search through some of the work-related things I'd written in recent years. I found countless cases in which I had written things like:
I can but conclude ...
I can but suggest ...
I can but assume ...
I can but advise ....
etc. etc.
In documents (reports etc.), rather than correspondence, I commonly 'de-personalised' it, by changing the "I" either to "One" or to "It" (with appropriate change of verb form - e.g. "It can but be assumed ..."). No-one has ever asked for clarification or 'corrected' what I've written (my documents are usually 'reviewed' by others) and I've never been aware of any situations in which someone has interpreted my words differently from my intended meaning.
Conversely, I could find no instances of my having written (in the sort of constructs we are talking about) "... can not but ..." or "... cannot but ...". Furthermore, much the same as the above was true when I looked at 'incoming' work-related correspondence and documents.
So, it's clear what I have always done (and will continue to do!), apparently without adverse comment or any impediment of effective communication - and I have to say that I cannot get all that excited about whether or not is is 'correct' (in whoever's eyes!).
Kind Regards, John