Certificate for #6250 ⟨a, b | aaa=a, aabba=a

Completion settings:

[1] aaa=a

Axiom: aaa=a.

Defines rule #1.

Referenced by [3].

[2] aabba=a

Axiom: aabba=a.

Referenced by [3].

[3] abba=aa

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

a aa aabba

Critical pair: aa=abba.

Flip LHS and RHS.

Defines rule #2.