It is probably not the case that Lily is yellow. There is little chance that Emily is a wolf. It is unlikely that Mary took the football. It is probable that if 'Lily is yellow and Mary took the football' then Julius is a rhino. It is probably the case that if 'Emily is a wolf and Lily is yellow' then John dropped the apple. It is certain that if 'Lily is yellow and Emily is a wolf' then Bill left the milk.
It is certain that 'Julius is a rhino and Mary took the football'.
It is highly unlikely that 'Julius is a rhino and Mary took the football'.
It is certain that 'Julius is a rhino and Mary took the football'.

  and(A,B) :- A,B.
  or(A,B) :- A;B.
  nand(A,B) :- not(and(A,B)).
  nor(A,B) :- not(or(A,B)).
  xor(A,B) :- or(A,B), nand(A,B).

  %hop0
  0.25::factA.
  0.1::factB.
  0.2::factC.
  %hop1
  0.7::factX:-and(factA,factC).
  0.7::factY:-and(factB,factA).
  1.0::factZ:-and(factA,factB).

  %hop2
  conclusion:-and(factX,factC).

  query(conclusion).
  
'Julius is a rhino and Mary took the football'.