The document discusses hedging, or cautious language, as a key feature of academic writing. It explains that hedging is useful when commenting on other researchers' work or discussing different studies, as it is difficult to be certain of all the evidence. It provides examples of hedging language and compares stronger and weaker claims. The document emphasizes that hedging allows for more precise writing while reflecting the writer's stance on the evidence, and too much hedging could undermine confidence, so a balance is important.