Re: Optional Soundlaws (was: IE *aidh- > *aus-tr- 'hot, warm (wind)'

--- In cybalist@yahoogroups.com, "dgkilday57" <dgkilday57@...> wrote:

>
> In sum, no evidence for optional soundlaws in these words, just the
> usual complications which interfere with orderly Neogrammarian
> phonetic change in real languages.

Aren't back formations and analogy optional sound-laws?