hey all, I have a few questions about Occam's razor. First what is considered to be a entity? Is it any basic law of nature? (that is not a result of other laws). A mathematical axiom/set of axioms that is needed for the theory (like Euclidean geometry for classical optics). Basic definitions for the theory? (like mass or time in Newtonian). A field or a particle? Second, are all Entities are same in their "value"? I mean, can we say that we prefer one kind of entities over another? For example, to prefer additional dimension rather then a new particle? Is it true, and why is it, we prefer Entities to be symmetrical? All those questions aren't relevant when we can distinguish between the theories with a experiment. Thank you, Niv. P.S. Are there other ways except from experiment or Occam's razor?