I will make two statements, followed by evidence. If you can refute them, I will concede. If not, you must accept it. 1. Vaccines have been shown to cause encephalitis. This is documented in the Institute for Vaccine Safety (Johns Hopkins) reviews, which conclude that measles-containing vaccines can cause measles inclusion body encephalitis (MIBE), that certain historical mumps vaccine strains caused encephalitis, that varicella vaccine can cause viral meningitis, and that yellow fever vaccine causes yellow fever vaccine-associated neurotropic disease (YEL-AND), which includes encephalitis. These conclusions draw from Institute of Medicine (now National Academy of Medicine) assessments, Vaccine Safety Datalink analyses, case reports with laboratory confirmation of vaccine-strain virus, and pharmacovigilance data. 2. Encephalitis has been shown to cause autism. This is documented in multiple peer-reviewed case reports and series describing previously typically developing children who developed core autism spectrum features (developmental regression, loss of language, social withdrawal, stereotypies) after herpes simplex encephalitis, enterovirus encephalitis, or anti-NMDA receptor encephalitis. It is further supported by a nationwide claims-database cohort study finding an association between viral meningitis/encephalitis and subsequent autism spectrum disorder diagnosis (with the association persisting in sibling analyses), as well as reviews linking post-infectious and autoimmune encephalitis to acquired autism-like presentations. Feel free to fact check these. If vaccines can cause encephalitis, and encephalitis can cause autism, then vaccines can cause austim. This isn't rocket science.