It is probable that Mary left the football. It is highly likely that Emily is a mouse. There is little chance that Lily is yellow. We believe that if 'Lily is yellow and Mary left the football' then Brian is a rhino. It is certain that if either 'Mary left the football' or 'Emily is a mouse' but not both then John moved to the office. It is almost certain that if 'Lily is yellow' or 'Emily is a mouse' or both then Julius is a lion.
It is highly unlikely that 'Brian is a rhino' or 'Emily is a mouse' or both.
It is highly likely that 'Brian is a rhino' or 'Emily is a mouse' or both.
It is highly unlikely that 'Brian is a rhino' or 'Emily is a mouse' or both.

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

  %hop2
  conclusion:-or(factX,factB).

  query(conclusion).
  
'Brian is a rhino' or 'Emily is a mouse' or both.