Green Oasis

For reasons that have arisen elsewhere, I’m creating an open thread for anyone who would like to show me the error of my ways. The only ground rules are 1) be civil and 2) expect to have your reasoning questioned. Other than that, feel free to tell me why I should believe that Joseph Smith was a prophet of God, that extraterrestrials have visited Earth and probed its lifeforms, homeopathy can cure dandruff, etc. I welcome your cogent arguments.