Questions & Answers about Die Antwort ist falsch.
Because falsch is used predicatively—after the linking verb sein (to be). Predicative adjectives never take endings. If you use it attributively (directly before a noun), you do inflect it:
• eine falsche Antwort (a wrong answer)
You insert nicht before the adjective:
Die Antwort ist nicht falsch.
That literally means “The answer is not wrong.”
Both mean “wrong” or “incorrect,” but:
• falsch is more common in everyday speech (“wrong answer,” “false statement”).
• unrichtig sounds a bit more formal or technical.
• Die Antwort ist falsch is a complete sentence: subject + verb + predicate adjective (“The answer is wrong”).
• die falsche Antwort is only a noun phrase (“the wrong answer”). You’d need a verb or another context to make it a full sentence.
Yes, you can front falsch for stylistic emphasis, but you must still keep the verb in second position:
Falsch ist die Antwort.
This emphasizes falsch, but it’s less neutral than the original.