A sarcasm detector. That's a real useful invention.
Even though I can see how a false positive would make a great joke out of a serious text.
Since sarcasm is the biggest weakness of sentiment analysis, I don't have much faith that sentiment analysis tools will produce truthful results when aimed at social media.
What if the person you're responding to (for the sake of argument) really doesn't know?
I mean, it can take some time to find out if an invention is truly useful.
So if we point it at that statement and demand a verdict, it's sort of an undecidable problem.
No, it is simply a good response. I'm British (and have special skills) and can inform you that satherx is either rather obviously sarcastic or a lemon.