Learn Dutch: Wat de schildpad gebruikt, is geen list. - Whatever the tortoise uses, is no trick.

Normal relative pronouns refer back to a specific noun earlier in the sentence (called the antecedent). Here, wat acts as a "free" relative pronoun, meaning it doesn't refer back to anything. Instead, it creates a clause that functions as an independent subject, meaning "the thing that" or "whatever".

Why does the second half of the sentence start with the verb is?

Dutch strictly follows the verb-second (V2) rule in main clauses. The entire free relative clause Wat de schildpad gebruikt acts as a single block occupying the first position of the sentence. Therefore, the main verb is must immediately follow it to take the second position.

Why translate wat as "whatever" instead of just "what"?

While "What the tortoise uses" is also a correct translation, free relative clauses with wat often imply a broad, open-ended condition. Translating it as "whatever" captures this general, unrestricted sense very naturally in English.

Quick refresher: why use geen instead of niet to mean "no trick"?

Geen is used to negate indefinite nouns (nouns that would normally take een or no article). Because you would say een list ("a trick"), you must negate it with geen list ("no trick" or "not a trick"). Niet is generally reserved for negating verbs, adjectives, or specific, definite nouns.