Certificate for #644 ⟨a, b | ab=aa, bbb=a

Completion settings:

[1] aa=ab

Axiom: ab=aa.

Flip LHS and RHS.

Referenced by [3].

[2] a=bbb

Axiom: bbb=a.

Flip LHS and RHS.

Defines rule #2.

Referenced by [3], [4].

[3] aa=bbbb

Simplify [1] aa=ab.

Reduce RHS:

[2](a)b
bbbb

Referenced by [4].

[4] bbbbbb=bbbb

Overlap of [3] aa=bbbb with [2] a=bbb:

aa a

Critical pair: bbba=bbbb.

Reduce LHS:

[2]bbb(a)
bbbbbb

Defines rule #1.