Hi all,
Note: as far as I can tell, the stats available at https://tools.wmflabs.org/wikidata-primary-sources/status.html so far do not differentiate between "fact wrong" (as in "Barack Obama is president of Croatia" [fact wrong]) and "source wrong" ("Barack Obama is president of the United States", "according to http://www.theonion.com/" [fact correct, source wrong]). From anecdotal evidence: most rejected facts were rejected due to shady sources… A big problem is also Citogenesis (https://xkcd.com/978/).
Cheers, Tom