Standardized test
The standardized test will come in two formats.
The first will test your factual knowledge of the key subjects that make up the metaculture wiki. Eventually, it should be a comprehensive test similar to an ACT/SAT/MCAT/LSAT/etc. that can benchmark your knowledge across the entire educational spectrum and give you an effective grade level proficiency for every subject. This should help put Dunning-Kreuger to rest.
The second will ask about different aspects of your personal belief system, compare them to the positions taken within the metaculture wiki, and offer a similarity benchmark that indicates how much commonality they have, along with links to the relevant pages to justify the result. This will be an easier test that could be shared on social media, like a "Which member of the Friends cast are you?" but for for your philosophy of life. It will reinforce the point that we are all part of the universal in-group, and allow people to trust that the wiki shares their perspective without having to read the entire thing.