Learn German: Ich wüsste die Antwort nicht. - I would not know the answer.

Wüsste is the Konjunktiv II (Subjunctive II) form of wissen. While many German verbs use würde plus an infinitive to express a hypothetical (like ich würde gehen), highly common verbs such as modals, haben, sein, and wissen strongly prefer their one-word Konjunktiv II form. Saying ich würde wissen is technically understood but sounds clumsy to native speakers compared to ich wüsste.

How does wüsste differ from wusste?

The umlaut changes the meaning completely! Ich wusste is the simple past tense (I knew), whereas ich wüsste is the Konjunktiv II (I would know). The umlaut here turns a factual statement about the past into a hypothetical statement about the present.

Could I use kennen instead of wissen in this sentence?

You could technically say Ich würde die Antwort nicht kennen, but wissen is much more idiomatic here. Wissen focuses on knowing a fact or a specific piece of information, which perfectly fits knowing an answer. Kennen implies familiarity through personal experience (like knowing a person, a city, or a song), so it feels less natural when talking about a factual answer.

Why is nicht at the very end of the sentence?