YES We show the termination of the TRS R: and(not(not(x)),y,not(z)) -> and(y,band(x,z),x) -- SCC decomposition. Consider the dependency pair problem (P, R), where P consists of p1: and#(not(not(x)),y,not(z)) -> and#(y,band(x,z),x) and R consists of: r1: and(not(not(x)),y,not(z)) -> and(y,band(x,z),x) The estimated dependency graph contains the following SCCs: {p1} -- Reduction pair. Consider the dependency pair problem (P, R), where P consists of p1: and#(not(not(x)),y,not(z)) -> and#(y,band(x,z),x) and R consists of: r1: and(not(not(x)),y,not(z)) -> and(y,band(x,z),x) The set of usable rules consists of (no rules) Take the reduction pair: lexicographic combination of reduction pairs: 1. matrix interpretations: carrier: N^1 order: standard order interpretations: and#_A(x1,x2,x3) = x1 + x2 + x3 not_A(x1) = x1 + 1 band_A(x1,x2) = x2 + 1 2. matrix interpretations: carrier: N^1 order: standard order interpretations: and#_A(x1,x2,x3) = x2 + x3 not_A(x1) = 1 band_A(x1,x2) = x2 + 2 The next rules are strictly ordered: p1 We remove them from the problem. Then no dependency pair remains.