To summarize, there are in particular ideas
1. that are true and correctly assented to;
2. that are false and mistakenly assented to;
3. that are doubted and are being researched;
4. whose truth value is not known and that are fancifully entertained;
5. that are true yet thought false;
6. that are false and known to be such.
Hume, arrange these in the order of increasing “force and vivacity.”