Certificate for #1986 ⟨a, b | aaa=a, aabb=a

Completion settings:

[1] aaa=a

Axiom: aaa=a.

Defines rule #1.

Referenced by [3].

[2] aabb=a

Axiom: aabb=a.

Referenced by [3].

[3] abb=aa

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

a aa aabb

Critical pair: aa=abb.

Flip LHS and RHS.

Defines rule #2.