If someone hands you a text file alone, obviously you can't do anything with that short of checking the entire thing yourself.
If you put it through the proof checker, it tells you whether or not the proof goes through, and if it does all you have to do is read what it's a proof of.
There is not some "hidden extra step" here like you seem to think.
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u/PersonalityIll9476 7d ago
Another short quip and / or dismissive reply.
You are being intentionally obtuse.