It is a mechanism to validate the quality of the questions and be rewarded with Antimatter. Through the likes, the players themselves are optimizing the content quality within the game itself.
A question that receives many likes is automatically denominated as a "Certified Question" without having to debate it. If one of your questions is certified, you will be rewarded with Antimatter.
On the contrary, if a question receives many 'dislikes' it is automatically debated with the rest of the players.
Remember to create proper questions to get more likes and be rewarded with Antimatter. Good Luck!"