Obviously you have make it long enough! 😅

So someone should be not enough educated to use a weak passphrase, but has the competency to recalculate a checksum? I repeat: it's an advanced feature, and like all advanced features it requires a precise application in relation to goals and circumstances. For sure, every UI that exposes the passphrase possibility must do it carefully, use the correct terns ("25th word" is just wrong) and point the user to a good informative resource.

> It's unlikely that someone will make their paraphrase long enough to prevent someone from brute forcing it Reality check: for the casual user that doesn't have a life changing amount in Bitcoin, it is more likely that the seed is found by a roommate or some random guy that works in their property, instead of being the target of a determined, informed and well-equipped attacker. So even a medium simple and high memorable passphrase can be effective in many situations as additional security layer.