A Consistent Histories solipsism?

[JamieSalaor]

Well yes, that's the thing with solipsism. You can always come up with an argument suggesting it. But nothing in science implies that it's the case. Therefore being a solipsist would be too be a matter of faith. One that seems considerably more unreasonable and just unnecessarily arrogant...

What I take from the quote is the Griffiths is saying that Consistent Histories suggests no reason at all to deny the existence of external reality... But if one were to deny external reality it would be very difficult to convince them otherwise...
Carlo Rovelli said the following about solipsism in an email conversation I had with him

Solipsism is a disease which plagues those who are too insecure to accept the limits of our knowledge

Thanks for everything everyone