Certificate for #14693 ⟨a, b | aabb=a, abbba=a

Completion settings:

[1] aabb=a

Axiom: aabb=a.

Defines rule #2.

Referenced by [3].

[2] abbba=a

Axiom: abbba=a.

Defines rule #3.

Referenced by [3].

[3] aba=aa

Overlap of [1] aabb=a with [2] abbba=a:

a abb abbba

Critical pair: aa=aba.

Flip LHS and RHS.

Defines rule #1.