What AI tasks do you wish had an independent "is this actually correct?" check?

I've been experimenting with a simple idea for making AI systems more reliable:

Instead of:

Question → AI → Answer 

have:

Question ↓ AI generates an answer ↓ External check ↓ Correct → output Wrong → feedback → try again 

I've built some small prototypes around this using Gemini/GPT and tools that can independently check things like code, equations and logic.

I'm now thinking about testing it on more everyday AI failures:

• exact counting
• arithmetic
• dates/time
• processing long lists
• citations
• structured information

The bigger idea is eventually to do the same thing with specialized capabilities — e.g. a physics or time-series system with its own simulator/evaluator.

But before going further, I'm curious what people actually care about.

What is something you regularly ask AI to do where you think:

'This sunds convincing, but I really wish something independent could check it'

Could be something technical or completely mundane.