Exercise 13.2 Sam has proposed that any n-ary relation P(X1,X2,X3, . . . ,Xn) can be reexpressed as n − 1 binary relations, namely, P1(X1,X2).

P2(X2,X3).

P3(X3,X4).

...

Pn−1(Xn−1,Xn).

Explain to Sam why this may not be such a good idea. What problems would arise if Sam tried to do this?