No indicative conclusion can be validly drawn form a set of premises which cannot be validly drawn from the indicatives among them alone.
只要我们不能从陈述句中有效地引出一组前提,则我们就不能从这组前提中有效地引出任何陈述式结论。
n. 陈述语气;(indicative的复数)
No indicative conclusion can be validly drawn form a set of premises which cannot be validly drawn from the indicatives among them alone.
只要我们不能从陈述句中有效地引出一组前提,则我们就不能从这组前提中有效地引出任何陈述式结论。