“Meta logic:a branch of analytic philosophy that deals with the critical examination of the basic concepts of logic”;
“Meta mathematics:the philosophy of mathematics,especially,the logical syntax of mathematics”;
“Meta science:a theory or science of science,a theory concerned with the investigation, analysis, or description of theory itself.”(一种科学中的科学或理论,一种对原理本身进行调查、分析和描述的原理。)