Dear all!

As I am quite new to all this, maybe a very noob question. I prompted bing, bard and chatgpt (3.5) with the same question. Bing just straight up answered different questions but delivered sources I could check. Bard and chatgpt answered my questions but just invented (all) sources. Just made up randomised authors and title names. Bard delivered links to said scientific articles, but when you followed the link the articles in question were completely different.

1. How can you I trust delivered results, when the sources are made up?

2. And also: why? Why didn't it say for example there are no meta-analyses?

3. is it better in the payed version from chatgpt?

Thanks in advance!