Does this include the following?
- Reading some words/digits in the online computer.
- Walking to the airgapped one.
- Manually typing the memorized words/digits on the keyboard.
It's effectively a data transfer but the bad guys would have a really hard time trying to compromise the airgap through it. Of course it's inconvenient as hell but we all know that's the price you pay for security

.
I guess you might get away with that...
But I don't think the risk is quite zero. Probably minuscule enough though.