Does belief require a rational ground? Is faith a rational ground?

Does belief require a rational ground? Is faith a rational ground?
https://x.com/garrytan/status/1755271682779156986?s=46

Design and software at Apple. Also into AI, philosophy of mind, ethics.

if you know that what you have faith on is unknown (like if God exists) then it seems rational to be faithful no?

experiments and stories for people curious enough to read: paragraph.xyz/@oversky

not quite following you here - why would it be rational to have faith if something is unknown? seems the rational thing is to reserve judgement or default to lack of faith. not that it's "wrong" to have faith - i just don't see the argument that it's rational.

Rationality is solving some problem through active error correction. If something cannot be known (like God) then there’s no way to solve it. Not sure if faith is rational or not but having it seems understandable given the circumstance

More rational to reserve judgement (agnosticism). Defaulting to lack of faith seems just as rational to me as defaulting to having faith