There is almost no chance that Mary went to the office. It is impossible that John moved to the garden. It is probable that Brian is a lion. There is little chance that if 'Brian is a lion and Mary went to the office' then Winona is a sheep. It is highly unlikely that if 'Brian is a lion and Mary went to the office' then Daniel took the milk. There is a better than even chance that if either 'John moved to the garden' or 'Brian is a lion' but not both then Julius is a swan.
It is likely that 'Brian is a lion' or 'Winona is a sheep' or both.
It is likely that 'Brian is a lion' or 'Winona is a sheep' or both.
It is probably not the case that 'Brian is a lion' or 'Winona 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
  0.02::factA.
  0.0::factB.
  0.7::factC.
  %hop1
  0.1::factX:-and(factC,factA).
  0.05::factY:-and(factC,factA).
  0.6::factZ:-xor(factB,factC).

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

  query(conclusion).
  
'Brian is a lion' or 'Winona is a sheep' or both.