reality check 
noun [usually in singular] informal
An occasion on which one is reminded of the state of things in the real world: the bloated financial industry needs a reality check...
- Let's hope that those responsible for the proper use of State funds experience a swift reality check in the interim.
- But let's take a quick reality check and see what increased tuition really means.
- It's also a wake-up call, a reality check from which you emerge with a reassuring sense of integrity.
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