Certificate for #16369 ⟨a, b | aba=aa, babb=bb

Completion settings:

[1] aba=aa

Axiom: aba=aa.

Defines rule #1.

Referenced by [3].

[2] babb=bb

Axiom: babb=bb.

Defines rule #3.

Referenced by [3].

[3] aabb=abb

Overlap of [1] aba=aa with [2] babb=bb:

a ba babb

Critical pair: abb=aabb.

Flip LHS and RHS.

Defines rule #2.