the idea behind

phrase

: the reason for (something)

I just don't get/understand the idea behind this change in the rules.

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the idea

the idea behind

the imperative

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“The idea behind.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/the%20idea%20behind. Accessed 14 Mar. 2026.

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the idea behind

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