that is which是怎么用的,分析下句式谢谢

that is which would falsify the hypothesis.这是一句完整的话,if established as true,是插入语that指的是谁?怎么看出来的that 先行词，引导从句statements that （are inconsistent with it, that is which, if established as true, would falsify the hypothesis.） are 缺主语，所以是定语从句已追加悬赏。麻烦你给详细分析一下整个句子结构A hypothesis 主语isfalsifiable 表语if there exists a logically possible observation statement or set of observation statements that are inconsistent with it, that is which, if established as true, would falsify the hypothesis. 条件状语that 先行词，引导从句statements that （are inconsistent with it, that is which, if established as true, would falsify the hypothesis.） are 缺主语，所以是定语从句看不明白，说的详细点定语从句 statements that are inconsistent with itif established as true, 条件状语that is which would falsify the hypothesis.（which 疑问词引导宾语从句。）