HOW IS IT THAT CERTAIN THINGS ARE UNCHANGING WITHIN OUR OF WORLD MOLECULES-IN-MOTION?

Science depends upon unchanging laws. Without these, there can be no experimentation and replication, confident findings, predictability, and even textbooks to record the findings. Without unchanging verities, there can be no knowledge, nothing that we can say that will remain unchanged in the next moment.

Yet we do have knowledge and publishable scientific findings. What then accounts for knowledge or any knowledge in a sea of molecules-in-motion, and what keeps our unchanging laws immutable as they are?