The other solution is that of nominalism. Here the thesis is that universals such as the ideas or forms of Plato are unnecessary in an explanation of language, thought and the world. Only single individuals are real, but they can be grouped together by a human observer through their similarities.
Nominalism suggests that abstract concepts like Plato's ideas or forms are unnecessary in explaining language, thought, and reality. Only individual instances of things actually exist, but humans can group them together based on similarities.