A scientific law is based on repeated inferences made over long period?

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Babilgurl asks an interesting question.

Not sure of the real answer, but most of the scientific laws I know of are based on the results of analysis (mathematical and/or laboratory) that may have been influenced by prio inference... although the prior inference may not have been correct

Newton's laws, Boyle's law, etc.

Yup, and the conclusions reached have to be verifiable by others before they are accepted as "law." Someone comes up with the idea, for example, that strong gravity from large objects in space bends light. The person makes some observations and determines that his work proves that it is so, and publishes his work and his conclusion. The scientific community won't accept the conclusion as valid unless others can duplicate the work and reach the same conclusion.