Which english thinker believed scientists should only accept ideas that have been proven through repeated observations and practical experiments?

Sir Francis Bacon, proposed a method in which scientists should set a series of experiments to try to prove their hypotheses wrong. He insisted in the fact that these experiments should be repeated before they could assure that what they believed was truth, was actually truth.

The following English thinker believed scientists should only accept ideas that have been proven through repeated observations and practical experiments:

according to this text from the preamble to the declaration, who gives men their unalienable rights?