According to facebook’s like feature, you can’t unlike something unless you like it before. It is an interesting philosophy though. It makes sense in real life too. How do you know that you don’t like something unless you liked it before? In the same time, liking is state of different emotions that you associate the thing or the person with your own standards. You don’t need to like something before and unlike it later on. You can just unlike it from the start.
Nothing can be loved or hated unless it is first known.
-Leonardo Da Vinci
Da Vinci says, knowing comes first before like or unlike. Then, facebook needs “I know” button before “Like”, unless we take the post as a knowledge.
Is it possible to like something without knowing it?
No! But the degree of knowledge you have for the matter can be different. This doesn’t matter to determine to like something. It is possible to like something with very little knowledge about it; the same is true vice versa
I believe that this is the success behind the “Like” button on facebook. A lot of platforms usually have like and dislike buttons. (e.g YouTube) and usually people feel offended having dislike buttons. Rather, you can keep the like button solely because “less likes” means something by itself.