The simple idea
We all have beliefs. Normally, good evidence can change them. A delusion is different: it stays locked in place no matter what.
- Everyday suspicion: "I wonder if my neighbour dislikes me." (open to change)
- Delusion: "My neighbour has built a machine to control my thoughts." (unshakeable)
The common flavours
- Persecutory: "People are trying to harm or spy on me." (the most common)
- Grandiose: "I have special powers or a huge mission."
- Referential: "The TV newsreader is speaking directly to me."
- Jealous: "My partner is unfaithful," with no real evidence.
- Misidentification: believing a loved one has been swapped for an identical impostor.
| Flavour | The belief |
|---|---|
| Persecutory (commonest) | "people want to harm or spy on me" |
| Grandiose | "I have special powers or a mission" |
| Referential | "the TV is speaking to me" |
| Jealous | "my partner is unfaithful" (no evidence) |
| Misidentification | "a loved one was swapped for an impostor" |
The questions that matter
Don't ask only "is the belief false?" Ask:
- What exactly is the belief?
- How strongly is it held?
- What evidence does the person give?
- Could contradictory evidence change it?
- Does it fit their culture?
- How is it affecting their behaviour?
Quick check ✅
- In one line: how is a delusion different from ordinary suspicion?
- "The radio host keeps sending me secret messages." Which flavour of delusion?
Remember this 🌟
Where we're going next → From false beliefs to false perceptions — hallucinations (Concept 11).