It is likely that Julius is a rhino. It is probable that Brian is yellow. We doubt that Mary moved to the garden. It is unlikely that if 'Brian is yellow and Mary moved to the garden' then Gertrude is a sheep. It is probable that if 'Brian is yellow' or 'Julius is a rhino' or both then Sandra dropped the apple. It is probably not the case that if 'Brian is yellow' or 'Julius is a rhino' or both then Lily is a frog.
It is impossible that 'Julius is a rhino' or 'Gertrude is a sheep' or both.
It is likely that 'Julius is a rhino' or 'Gertrude is a sheep' or both.
It is impossible that 'Julius is a rhino' or 'Gertrude is a sheep' 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.
  0.7::factB.
  0.2::factC.
  %hop1
  0.2::factX:-and(factB,factC).
  0.7::factY:-or(factB,factA).
  0.25::factZ:-or(factB,factA).

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

  query(conclusion).
  
'Julius is a rhino' or 'Gertrude is a sheep' or both.