4.9 Can't break down from 3 to 2. Show that there is no way to build a 3-SAT clause (x vy vz) out of 2-SAT parts. In other words, show that there is no 2-SAT formula involving x,y,z and any number of additional variables, such that is satisfiable if and only if at least one of x, y, or z is true. However, this does not prove that 3-SAT is not in P Why not