definitely the cause of the COVID-19 pandemic...you absolutely no conclusive evidence for either claim...as the Linked Science article and FactCheck summary explain...enjoy your readings ;-)
If either of you had such evidence it would be front page news all over the world...have you seen such reports?...that's a rhetorical question, Mark.
https://www.factcheck.org/2021/05/the-wuhan-lab-and-the-gain-of-function-disagreement/
Link: https://www.science.org/content/article/why-many-scientists-say-unlikely-sars-cov-2-originated-lab-leak