> Google denies doing it

Read their statement carefully and it's actually not a denial of the allegation.

> But Google is firmly and clearly denying the data was used: “Bard is not trained on any data from ShareGPT or ChatGPT,” spokesperson Chris Pappas tells The Verge

* Allegation: Google used ShareGPT to train Bard.

* Rebuttal: The current production version of Bard is not trained on ShareGPT data

Both things can be true:

* Google did use ShareGPT to train Bard

* Bard is not currently trained on any data from ShareGPT or ChatGPT.

It depends on what the meaning of is is ;)