It is highly unlikely that Julius is a rhino. There is a very good chance that Emily is a mouse. There is almost no chance that John went to the hallway. It is certain that if 'Julius is a rhino and Emily is a mouse' then Jason is tired. It is likely that if either 'Julius is a rhino' or 'Emily is a mouse' but not both then Brian is yellow. There is little chance that if either 'Julius is a rhino' or 'John went to the hallway' but not both then Greg is a lion.
There is a very good chance that 'Emily is a mouse' or 'Julius is a rhino' or both.
There is a very good chance that 'Emily is a mouse' or 'Julius is a rhino' or both.
It is highly unlikely that 'Emily is a mouse' or 'Julius is a rhino' 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
  0.05::factA.
  0.8::factB.
  0.02::factC.
  %hop1
  1.0::factX:-and(factA,factB).
  0.7::factY:-xor(factA,factB).
  0.1::factZ:-xor(factA,factC).

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

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