system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5:Why is string theory such a widely known (possibly believed) theory if there's no evidence for it?
gpt
We know a lot more than we can prove basically. For example, there is no way there was going to be such a huge effort to search for the Higgs if people weren't almost certain it was there. For example assuming that Higgs exists gives you correct results in calculations and even made some predictions which people tested and found to be true, but they hadn't found the particle itself.   
  In the case of String theory is often gives the right results(mainly because it gives a lot of results) and it links relatively easily in with much of the standard model. This makes people believe it has a fair chance of being broadly the right idea.