~Equals(a,b)
~Equals(a,c)
~Equals(b,a)
~Equals(b,c)
~Equals(c,a)
~Equals(c,b)
~Equals(a,table)
~Equals(b,table)
~Equals(c,table)	

all x all y all z all s on(x,y,s) ^ on(x,z,s) -> Equals(y,z)
all x all y all z all s on(x,z,s) ^ on(y,z,s) -> Equals(x,y) v Equals(z, table)

all s all x clear(x,s) <-> (~ exists y block(x) ^ on(y,x,s) v Equals(x,table))

all s all x all y all z clear(x,s) ^ clear(y,s) ^ on (x,z,s) -> 
    on(x,y,result(move(x,y),s)) ^ clear(z,result(move(x,y),s)) ^ clear(x,result(move(x,y),s))

all s all x all y all z all w
         on(x,y,s) ^ ~Equals(x,z) -> on(x,y,result(move(z,w),s))

all s all x all y all z
         clear(x,s) ^ ~Equals(x,z) -> clear(x,result(move(y,z),s))

on(a,table,s0)
on(c,a,s0)
on(b,table,s0)
clear(c,s0)
clear(b,s0)
all s clear(table,s)

~exists s on(a,b,s) ^ on(b,c,s) ^ ~answer(s)