That's not necessarily true. We have already written programs which are able to come to conclusions which are not obvious from a human perspective. This is fair

That's not necessarily true. We have already written programs which are able to come to conclusions which are not obvious from a human perspective. This is fairly common with big-data algorithms where a human just can't see the same pattern because we have different limitations in our ability to process mass amounts of data. My point was that it is human nature to build tools which allow us to exceed our own limitations. Sure, from my vantage point I see little reason to be optimistic about an algorithmic solution to sarcasm detection, but "if man were meant to fly he would have been given wings." Also, the example I gave is a simple solution: mind reading is a trivial solution to sarcasm detection, and it is not inconceivable from our current point of technology.