Chances are slight that Lily is a lion. We doubt that Jessica is a sheep. It is almost certain that Bernhard is yellow. It is almost certain that if 'Bernhard is yellow' or 'Jessica is a sheep' or both then Gertrude is a mouse. It is highly likely that if 'Bernhard is yellow and Lily is a lion' then Mary went to the kitchen. It is probable that if 'Lily is a lion and Jessica is a sheep' then Julius is white.
There is almost no chance that 'Jessica is a sheep and Lily is a lion'.
There is almost no chance that 'Jessica is a sheep and Lily is a lion'.
It is probably the case that 'Jessica is a sheep and Lily is a lion'.

  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
  0.1::factA.
  0.2::factB.
  0.95::factC.
  %hop1
  0.95::factX:-or(factC,factB).
  0.9::factY:-and(factC,factA).
  0.7::factZ:-and(factA,factB).

  %hop2
  conclusion:-and(factB,factA).

  query(conclusion).
  
'Jessica is a sheep and Lily is a lion'.