It is certain that John left the football. It is unlikely that Greg is a lion. There is a very good chance that Emily is a mouse. It is likely that if 'Greg is a lion' or 'John left the football' or both then Brian is a lion. It is unlikely that if either 'Emily is a mouse' or 'John left the football' but not both then Bill went to the office. It is almost certain that if either 'Emily is a mouse' or 'John left the football' but not both then Julius is yellow.
There is a better than even chance that 'Bill went to the office and Julius is yellow'.
It is highly unlikely that 'Bill went to the office and Julius is yellow'.
There is a better than even chance that 'Bill went to the office and Julius is yellow'.

  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
  1.0::factA.
  0.2::factB.
  0.8::factC.
  %hop1
  0.7::factX:-or(factB,factA).
  0.2::factY:-xor(factC,factA).
  0.95::factZ:-xor(factC,factA).

  %hop2
  conclusion:-and(factY,factZ).

  query(conclusion).
  
'Bill went to the office and Julius is yellow'.