In the dessent, what do justices often point out when making their arguments?

The correct answer is:

Flaws in the majority opinion.

They release the official statement, however, the justices that lost also provide their own description of why they decided to vote against something or for something and show why the majority opinion of the courty is not perfect. This is in cases where it's not unanimous.

you can infer that to folke dude was spying for allied nations

im not entirely sure what you're asking.