DIM a
DIM b

a = 1
b = 2

IF a = 1 AND b = 2 THEN
  ?  "Both expressions are true"
END IF

IF a = 1 OR b = 2 THEN
  ?  "At least one expression is true"
END IF

IF (a + 0 = 1 OR b <> 2 + 0) OR(b + 0 = 2 AND a + 0 = 1) THEN
  ?  "At least one expression is true"
END IF

Result:

Both expressions are true
At least one expression is true
At least one expression is true