question: Despite its imperfection , what are now considered valuable achievements of Principia Mathematica ?
answer: the book popularized modern mathematical logic and drew important connections between logic , epistemology , and metaphysics
turker_answer: Despite its imperfection , the book popularized modern mathematical logic and drew important connections between logic , epistemology , and metaphysics and are now considered valuable achievements of Principia Mathematica .
rule-based: Despite its imperfection , the book popularized modern mathematical logic and drew important connections between logic , epistemology , and metaphysics are now considered valuable achievements of Principia Mathematica .