11pm
My Brain (knocking)
Me: What, I'm watching TV!
My Brain: You know that Modbus problem you couldn't fix this afternoon? The problem is not with the error correction, it's with error detection.
Me: Fuck
My Brain: You're going to fix it right now, right?
Me: (sigh) ...yes...
@chaos440 Sometimes not burning out on the problem is the fastest way to solve the problem.