The same can be said for all branches of knowledge, and in particular for scientific knowledge. In science as in all other branches of knowledge we do not have an absolute source of infallible truth to which we can refer, which is of course why science can be at the same time so fascinating and so frustrating. Since we lack access to a source of absolute truth we have to rely on the next best thing, which is our own set of personal beliefs based on our assessment of the evidence and theories. The Earth is round, not flat. The Earth revolves around the sun, and not vice-versa.
Black holes exist in space, and mark the edge of space and time.
Thermonuclear 'cold fusion' has been observed in the laboratory. All living things, including human beings, evolved from common ancestry. God exists, and Jesus Christ was his only begotten son. Astrologers can accurately predict future events. A flying saucer crash-landed at Roswell, New Mexico, in 1947.