Does a survey on planning habits really serve to explain behaviors of verifying identity documents? Most of this is just background noise. These are declarative data that describe what happens, without truly elucidating the why or the underlying causality. A correlation is not proof of cause, and focusing on data interpretation without understanding the full process is a lack of discipline. For example, knowing that 75% of people verify their passports in advance says nothing about the concrete motivations, such as the experience of a traveler whose flight was canceled in the past.