I can open doors yet have no key, I can be a refuge, but I cannot be touched. What am I?

Category: Brain · Difficulty: expert

Hint: Consider something that can lead to new paths or solutions.

Answer

An idea

Explanation

Ideas unlock potential and possibilities but aren't tangible objects that can be held or physically interacted with.

This is a expert brain riddle — one of the harder riddles here. The answer is An idea.

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