Apparently according to the JW (dot) org website - wait for it - your faith is a personal thing.
If this were really true then the elders shouldn't be asking you awkward questions about what you believe (as a PIMO). Or if they do, you can just say that your faith is a personal matter....
https://www.jw.org/en/jehovahs-witnesses/faq/jw-bible-study/