I meant to simplify.
Rabbi Stiegman a"h of the OK, who researched this, said scotch that used sherry casks are kosher.
As you can see, there are definitely 2 very respectable sides to this debate.
You use of "simplify" doesnt make much sense here.
For the record: I love sherry cask scotch, especially when it gives flavor. I dont understand the shitas that say it doesn't. You can literally taste it in many cases.