单项选择题 Which of these is a reasonable definition of machine learning？（）

单项选择题 Suppose you are working on stock market prediction. You would like to predict whether or not a certain company will win a patent infringement lawsuit (by training on data of companies that had to defend against similar lawsuits). Would you treat this as a classification or a regression problem？（）

单项选择题 An algorithm capable of categorizing any future pie into one of the two classes (positive and negative) is（）