Will America come to our defense if an armed conflict breaks out in the South China Sea?

The big reason why we cannot believe US Vice President Kamala Harris' assurances (during her recent visit to the country) of her nation's military support in our territorial disputes in the South China Sea is that the US doctrine on this issue has long been settled and documented: It doesn't recognize the Philippines' and three other nations' territorial nor maritime claims in the Spratlys. It therefore cannot intervene in these disputes if an armed conflict breaks out there.