Thanks. The instructions are quite vague, though. On the one hand, it says:

Please do not vote solely based on how much you agree or disagree with someone's conclusions.

On the other:

In some cases it's probably acceptable to vote in order to register agreement or disagreement. For example, you can vote someone's proposal up or down based on whether you think it should be implemented.

In my view, this gives too much leeway to people to vote purely on the basis on disagreement with the conclusions.