> I don't consider snipping or eliding to be editing the quote,
It absolutely is editing, which is why it also is usually also marked by explicit editorial marks in brackets just as editorial interpolation is, except when you are snipping from the beginning or end of the quote, and even then may be marked if you aren't doing so at natural breaks in the source text.
As for interpolation, you use explicit marks to show that you've done it, and in either case it is wrong to do it to change the meaning.
Editorial interpolation isn't changing someone else's words, it's explicit, clearly delineated, paraphrasing.
> I don't consider snipping or eliding to be editing the quote,
It absolutely is editing, which is why it also is usually also marked by explicit editorial marks in brackets just as editorial interpolation is, except when you are snipping from the beginning or end of the quote, and even then may be marked if you aren't doing so at natural breaks in the source text.
As for interpolation, you use explicit marks to show that you've done it, and in either case it is wrong to do it to change the meaning.