By definition, not knowing if something is "true" is what makes belief "faith" and not simply "acceptance."
If a concept is scientifically provable and doesn't require any a level of acceptance which transcends the status quo, then it doesn't require faith to believe it. Faith is a choice made outside the purview of reason or logic.
"Now faith is confidence in what we hope for and assurance about what we do not see.
This is what the ancients were commended for."
- Hebrews 11:1-2