Academic and scientific German (wissenschaftliche Sprache) is not simply a matter of heavier vocabulary; it is a coherent system of stylistic choices designed to strip subjectivity from a text and give it an objective, verifiable character — the feature that most sharply distinguishes it from spoken German or even from ordinary formal writing. The first and most important rule is to avoid the first-person pronoun ich wherever possible, since scholarship is assumed to rest not on one individual's opinion but on findings any researcher could in principle reach. Ich habe untersucht ("I investigated") is therefore replaced with the passive es wurde untersucht ("it was investigated"), with the impersonal pronoun man, or with ready-made impersonal expressions such as es lässt sich feststellen ("it can be established") and es ist davon auszugehen ("it must be assumed"). This shift is precisely what separates a student still writing in a personal voice from a researcher writing in the voice of scholarship.
The second pillar is terminological precision: every concept is defined before it is used, and words with one clearly bounded meaning are preferred over general, multi-purpose words. Instead of the all-purpose sagen ("to say"), a writer chooses äußern, darlegen, or feststellen depending on the precise nuance intended — expressing an opinion, presenting an argument, or establishing a finding. The third pillar is lexical variety: repeating the same simple verb throughout a paragraph is a stylistic weakness, so writers alternate among precise near-synonyms; this overlaps directly with support-verb constructions (Funktionsverbgefüge), since eine Analyse durchführen ("to carry out an analysis") reads as stylistically stronger in a formal academic context than the bare verb analysieren.
The fourth pillar is the logical connectors that organize the flow of an argument: darüber hinaus, ferner, and zudem for addition; jedoch, hingegen, and indessen for contrast; folglich, demnach, and mithin for consequence; and d. h., nämlich, and beispielsweise for clarification. These connectors are more precise than their everyday counterparts aber/weil/deshalb because they specify the exact logical relationship — necessary consequence, explanation, or partial contrast.
The most common mistake among advanced learners is mixing registers: writing a precise, passive-voice academic sentence and then closing the paragraph with ich denke ("I think"), breaking the very stylistic consistency just established. Sustaining one register from the first word of a sentence to the last is what determines whether a text is genuinely academic or merely ordinary prose padded with difficult vocabulary.