MAYBE ignored inputs: (COMMENT Example 19 of [ SKAT15 , doi:10.4230/LIPIcs.RTA.2015.301 ] ) NRS: [ (0): |- (ucetaexp []X) -> (lam [a](app <[]X,a>)) ] Check confluence by orthogonality not abstract skeleton preserving result: MAYBE time: 0 msec.