Does "Despite the large number of philosophical schools and subtle nuances between many, all philosophies are said to fall into one of two primary categories, which are defined in contrast to each other: Idealism, and materialism.[a]" contain the correct answer to "What is the first question to ask in order to define the two classes?"

A: no

Does "Garrett Birkhoff writes: "John von Neumann's brilliant mind blazed over lattice theory like a meteor"." contain the correct answer to "Who wrote that "John von Neumann's brilliant mind blazed over lattice theory like a meteor?""

A: yes

Does "Musicians began playing it in Celtic, Bluegrass, Jazz and Rock-n-Roll styles and Classical too." contain the correct answer to "What types of music did musicians begin to play the mandolins in?"

A:
yes