There is overwhelming scientific evidence that explains why the sun 'rises'. There is also the fact, yes fact, that it has done so each and every day of my life, it is an observable event. It becomes a reasonable expectation that the sun will rise tomorrow. It's not faith defined as b (1): firm belief in something for which there is no proof .

I'm relying on scientific analysis and observable past events to inform my opinion that yes the sun will rise tomorrow. There's plenty of proof that it will.