  This reflection paper takes the 25th IUI conference milestone as an
opportunity to analyse in detail the understanding of intelligence in the
community: Despite the focus on intelligent UIs, it has remained elusive what
exactly renders an interactive system or user interface "intelligent", also in
the fields of HCI and AI at large. We follow a bottom-up approach to analyse
the emergent meaning of intelligence in the IUI community: In particular, we
apply text analysis to extract all occurrences of "intelligent" in all IUI
proceedings. We manually review these with regard to three main questions: 1)
What is deemed intelligent? 2) How (else) is it characterised? and 3) What
capabilities are attributed to an intelligent entity? We discuss the
community's emerging implicit perspective on characteristics of intelligence in
intelligent user interfaces and conclude with ideas for stating one's own
understanding of intelligence more explicitly.
