My question would be a follow up of this question, Survival without emotion, though not for the same purpose as mentioned in that question. Let me build up a story and a new world (which is a follow up of the existing one) to facilitate.
Suppose that everything is going as fine as it is now, same old Earth, same old people, and everything as it is. But let us bring an evil guy into the plot. This guy hates humans and human emotions, but he is super-super-super intelligent and can do anything. Moreover, he believes that machines are far more superior than humans and that emotions are a hindrance to our kind. So he makes an evil plan to wipe out every ounce of emotion from this planet, and successfully does it as well. Now with every kind of emotion, whether it be fear, anger, hormones (even them) are wiped out, there's nothing left but logic (similar to machines) in this new world.
The difficulty I find after this is that pure logic would have one big-big-big problem/glitch/bug/error/crash/whatever-you-may-call-it: Thinking from a purely logical viewpoint, we have no certain foundational meaning of existence. The universe came out of randomness within vantage of our view: the planets, the galaxies, everything. Consequentially, there will preference to anything? That is to say, everything or every task will have equal meaninglessness. Logically nothing could be preferred over any other task, right? I mean, logic would require us to choose from one of two, one of many, or from yes or no. But since none would be preferred, it's an impossible task.
My question is: could this scenario ever be realized? Is such a world building possible? Or would this result in a kind of system crash in computer language, or maybe a contradiction in mathematical.