I'd like to know that too. I got 28. The ones I got wrong I'm sure I got wrong because I started to think about it. I'd wonder if the person was smiling for example.
When I didn't think about it, And trusted my instincts and feelings instead. I always got it right. And figured it out almost instantly. But logically I can't explain that. It was like magic.
I don't know much about how the American accent arose. But from what I know about the Australian accent, it apparently arose in the first generation of children born in the country.
The people who stole these slides remind me of a child who cheats at spelling in primary school.
They may do well in tests, but as soon as they need to actually spell something they'll have no chance (hope my spelling is ok, by the way).
The other issue is that someone who would steel like that. Would probably also have other ethical shortcomings.
For example they may have no problems ripping off customers, employees or suppliers. Some people may think that is good in business. I don't.