Here's why:

* Scientific laws are based on empirical evidence and observation. They describe consistent patterns and relationships in the natural world.

* Personal beliefs are not based on objective evidence and can vary widely. They are often shaped by personal experiences, cultural influences, and individual values.

For example:

* Scientific law: The law of gravity states that objects with mass attract each other. This law is supported by countless observations and experiments.

* Personal belief: "The earth is flat." This belief is not supported by any scientific evidence and is contradicted by observations and measurements.

Other examples of non-examples of scientific laws might include:

* Religious doctrines: Religious beliefs are based on faith and interpretation, not scientific observation.

* Moral principles: Moral values are subjective and vary between cultures and individuals.

* Political ideologies: Political beliefs are often based on social and economic theories, not scientific principles.