  The Uniform Information Density (UID) hypothesis posits that speakers
optimize the communicative properties of their utterances by avoiding spikes in
information, thereby maintaining a relatively uniform information profile over
time. This paper investigates the impact of UID principles on syntactic
reduction, specifically focusing on the optional omission of the connector
"that" in English subordinate clauses. Building upon previous research, we
extend our investigation to a larger corpus of written English, utilize
contemporary large language models (LLMs) and extend the information-uniformity
principles by the notion of entropy, to estimate the UID manifestations in the
usecase of syntactic reduction choices.
