For 2 answer options on Q9 I have the following logic: (Q9_7 & Q9_8)
((! is_empty(q8_4.NAOK)) and (q8_4.NAOK <= "10")) or ((! is_empty(q8_5.NAOK)) and (q8_5.NAOK <= "10"))
If I answer neither q8_4 nor q8_5, then I do not get Q9_7 & Q9_8 (Correct)
If I answer both 0-10, then I do get Q9_7 & Q9_8 (Correct)
If I answer one of them 0-10, but leave the other blank, then I do not get Q9_7 & Q9_8 (WRONG)
If I answer one of them 0-10, but answer the other 99, then I do not get Q9_7 & Q9_8 (WRONG)
So what we need here: if Q8_4 OR Q8_5 are rated 0-10, then Q9_7 and Q9_8 are displayed