We doubt that Mary went to the office. It is almost certain that Julius is a lion. It is impossible that Winona is a sheep. We doubt that if 'Winona is a sheep' or 'Mary went to the office' or both then John took the apple. It is unlikely that if 'Winona is a sheep and Julius is a lion' then Sandra dropped the milk. It is probably the case that if 'Winona is a sheep and Mary went to the office' then Brian is a swan.
It is probable that 'Winona is a sheep' or 'Mary went to the office' or both.
It is unlikely that 'Winona is a sheep' or 'Mary went to the office' or both.
It is probable that 'Winona is a sheep' or 'Mary went to the office' 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
  0.2::factA.
  0.95::factB.
  0.0::factC.
  %hop1
  0.2::factX:-or(factC,factA).
  0.2::factY:-and(factC,factB).
  0.7::factZ:-and(factC,factA).

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

  query(conclusion).
  
'Winona is a sheep' or 'Mary went to the office' or both.