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The first person to use the formal "scientific method" as it is known today is Roger Bacon (1214 - 1253). He emphasized the use of mathematics in science, insisting that the numerical values of nature were important. 

The first person to use logic with observation to make discoveries was Aristotle (384 - 322 BC) in ancient Greece. His writings were coveted for thousands of years as the basis of truth, despite some glaring inaccuracy.

The modern scientific method was developed by Sir Francis Bacon (1561 - 1626) in his book Novum Organum. His use of strict controls is key to a uniform experimental method such as those performed today. It is useful to note that Bacon is also known as the father of empiricism, or the belief that knowledge is based on sensory experience. This belief may have been key to his discovery.

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