“…Consider the full quiver Γ consisting of two paths of length 2, connecting the same two vertices. The algebra A(Γ) can be viewed as the subalgebra of upper triangular matrices generated by the matrix units e 1,2 , e 1,3 , e 2,4 , e 3,4 and the e i,i , i = 1, 2, 3, 4. A(Γ) is not a relatively free PI-algebra since it does not contain a generic element in the (1,1)-position, but it does contain the relatively free algebra (without 1) generated by indeterminates x 1 , x 2 , x 3 , x 4 satisfying x 1 x 3 = x 2 x 4 and all other x i x j = 0, since these are the only relations arising from the arrows.…”