That's examples of deductively valid arguments.

这是演绎有效论点的例子。

Its truth has been proven inductively, not deductively.

它的真实性是被证明归纳而成的，而不是靠推理演绎得来。

Now that looks like a deductively valid argument doesn't it?

这看起来像演绎有效的论点，不是吗？

It's deductively valid. Anyone else wants to try another one?

这是演绎有效的，谁还想试试？

Now I had said some arguments are deductively valid but not in virtue of their form.

我说过一些论点是演绎有效的，但是不是它们的形式。