It is almost certain that Bernhard is a frog. It is certain that Jason is tired. It is likely that Jeff went to the bedroom. It is improbable that if 'Bernhard is a frog' or 'Jason is tired' or both then Mary moved to the garden. We doubt that if either 'Bernhard is a frog' or 'Jason is tired' but not both then Emily is a sheep. There is a very good chance that if 'Bernhard is a frog and Jeff went to the bedroom' then Greg is a swan.
It is likely that 'Jeff went to the bedroom and Bernhard is a frog'.
It is likely that 'Jeff went to the bedroom and Bernhard is a frog'.
It is impossible that 'Jeff went to the bedroom and Bernhard is a frog'.

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

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

  query(conclusion).
  
'Jeff went to the bedroom and Bernhard is a frog'.