might select the unusual design because it reminded them of a restaurant they enjoyed. Someone else might choose the smallest fork because they dislike bulky handles.
Those explanations are more useful than insisting that everyone who chooses a particular design must share the same trait.
You can also ask everyone to choose again after imagining a different setting. Would they make the same choice for a formal dinner? What about a picnic, a family meal, or a dessert table?
Changing the setting helps demonstrate how practical needs can influence preferences.
