@Chi-oma Firstly, I apologise; I'm new to this forum and claerly don't understand how it works, or to read it. My fault completely.
In answer to your question: It's easy to turn off the toggle button when following the instructions to do so in Labs, but in fact this does not turn off the 'AI' overview acting when one - or I - do Google searches after this. Rather, when I turn off the toggle switch in Labs, a small 'window' pops up which says that doing so will not stop the overview appearing during Google searches - which left me wondering what function the toggle-switch has if it doesn't do what it seems to offer.
And apologies again if I offended you.