In the colloquium, the professors raised a complex question that what do we really know, or how can we know what does everyone think about something.
My answer will be that we may never know exactly about the ways people thinking of some designs. The only thing we can know is whether something can be a useful tool for design. This can impact the decision of the designer. Then we can decide how to make the place better. This matters the most since we design for most people and can not pay attention to everyone. We should present a nice place for most people and let itself show a different amazing effect to each visitor.