Not all knowledge is based on faith. The flaw in this chain comes early on.
Look, I’m a Stoic, I know that my senses and the inputs they give me are flawed and those flaws are out of my control. I know that my mind is flawed and those flaws are out of my control. I also know that they’re the only tools I have to perceive the world and I have to do my best with them.
BUT.
Confidence intervals are a thing. It’s not a binary between the poles of “I know for certain” and “I don’t know at all”. We can say, “I am confident, based on multiple observations by myself and the reported observations of others, that the sun will rise tomorrow, water boils at the same temperature adjusting for altitude, and the traits of the parents and grandparents can predict the traits of the offspring via Punnett squares.”
The virtue of the scientific method is that the experiments must be repeatable. We don’t have to take it on faith. We can repeat variations of the experiment to raise or lower our confidence to acceptable levels.