Scores are stable over time. This can be determined by statistics. It’s called test-retest reliability.

We’ve both made our points. You have a great day.

It’s only the dogmatic book-worship type of materialism that says absolutely nothing can be accomplished by effort.

The more you study Chinese, the more Chinese you’ll know. Common sense.

You don’t get points for hobbying the hardest

Yes you do. In this case, he would have better Chinese.