Understanding [their] language -
Conspiracy theory - something that is true that [they] don't want known.
Baseless - something that is true that [they] don't want known.
Unsubstantiated - something that is true that [they] don't want known.
Sources deny - something that is true that [they] don't want known.
Debunked - something that is true that [they] don't want known.
Unfounded - something that is true that [they] don't want known.
Something that is true that [they] don't want known.