In case Covid-19 , verifiable fact support hypothesis SARS-CoV-2 intentionally manufactured laboratory.Various conspiracy theories supported correlations , existence BL4 Wuhan.The RBD sequences virus could , theory , result adaptation virus laboratory cultured human cells.But existence RBD sequence 99 % identical coronavirus infecting pangolin supports parsimonious hypothesis : infection bat pangolin two coronaviruses recombined form new virus turn infected human , would famous still unknown patient zero behind Covid-19 epidemic.The success conspiracy theories Covid-19 reveals much visceral need reassure inventing simplistic explanations terrifying natural phenomena.Which hypothesis unbearable – mad scientists subsidised foreign power sparked epidemic capable shaking modern societies , new epidemics emerge invasion destruction natural ecosystems ?