Some sluices are hard to spell out.
In particular, this is the case for clausal disjunctive sluices – sluices licensed by two disjoined clauses:
- Either the torsion axle is broken or the spring hangers are jammed up, but which is hard to say.
- That they either migrate from, or hibernate in this country, is certain, but which of the two still divides opinion.
- Cold/wind, and not a nice day but they are calling for rain OR snow they don't know which.
Consider also a sluice on an indefinite locative adverbial:
- Somewhere between Little Rock and Minneapolis will get a good amount of rain or snow. They don't know where yet.
Does this present a problem for the licensing condition proposed by Barros and Kotek (2019) (Ellipsis licensing and redundancy reduction: A focus-based approach) ((8), =(57))?