Based on my prior knowledge, the feature "persons" seems to be related to the task of rating the decision to buy a car. The capacity of a car in terms of the number of persons it can carry can have an influence on how satisfied someone would be with the decision to buy that car. 

Now, let's analyze the relationship between the feature "persons" and the target variable "decision to buy this car" based on the given categories: ['2', '4', 'more'].

- Unacceptable: It is possible that the decision to buy a car would be rated as unacceptable if the capacity of the car is insufficient, such as when it can only carry 2 persons, but the buyer usually needs to transport more people.
- Acceptable: The capacity of carrying 4 persons might be considered acceptable for many buyers as it can accommodate a small family or a group of friends. However, it is important to note that this may depend on individual preferences and needs.
- Good: The category "more" could indicate a larger capacity to carry more than 4 persons. This might be seen as a good feature by some buyers, especially those who frequently need to transport a larger number of people.
- Very good: Again, the category "more" might suggest a spacious car with the capability of carrying a significant number of persons, which could be perceived as very good by buyers who prioritize capacity.

Based on this analysis, let's create the dictionary:

```json
{
	"unacceptable": ["2"],
	"acceptable": ["4"],
	"good": ["more"],
	"very good": ["more"]
}
```