  Data scientists are not mathematicians, but they make heavy use of
mathematics in their daily work. While mathematicians can study a mathematical
object which is inaccessible to our five senses, data scientists must deal with
real-world data which are observable to us. This fine line suggests that a data
scientist's philosophical position on mathematics might have a nontrivial
impact on their work. By examining how different philosophical views of
mathematics affect the interpretation of the basic model assumption in data
science, we arrive at the conclusion that a data scientist, who uses modern
probabilistic and statistical tools, must be a Platonist.
