Simplify the following text for a Grade 10 native English-speaking person.
Original: It is also clear from other writings and historical artifacts , however , that Socrates was not simply a character , or an invention , of Plato .
Simplified: While a lot of what Plato wrote about Socrates is accepted by historians , some people believe that Plato ( who saw Socrates as a hero ) portrayed Socrates as a much greater man than he actually was . Some people think that Plato was simply using the character of Socrates as a tool to express his own opinions rather than to accurately write about Socrates .