I keep a file of Smith's false prophecies ready for the Morman missionaries at the door. They, of course, are much more interested in me hearing their well rehearsed message than they are answering the hard questions about their 'prophet'. I give them ample opportunity to explain why they are 'visiting' and then ask if they are willing to consider my concerns about their prophet that their religion is based upon.
They don't seem to mind when I open the bible to Duet.
"When a prophet speaks in the name of the Lord, if the thing does not come about or come true, that is the thing which the Lord has not spoken. The prophet has spoken it presumptuously; you shall not be afraid of him," (Deut. 18:20-22)
Mormans do not want to even consider that Joseph Smith might be a false prophet. They are instructed to never doubt his credentials. However, you can certainly bring up more than a couple of his false prophesies to get them thinking. However, when I start reading the failed prophesies from my file the responses are varied, sometimes pretty comical.
(Doctrines and Covenants 84:2-5,31.) This is the prophecy that the temple would be built in Missouri during Smith's generation.
(Doctrine and Covenants 87:1-3) This prophecy of Smith asserts that ALL nations would become involved in the American Civil War.
(Pearl of Great Price, Joseph Smith, History, verse 40) Smith's prophecy that Isaiah 11 was 'about to be fulfilled'.
Here is another one: David W. Patten to go on a mission
'Verily, thus saith the Lord: It is wisdom in my servant David W. Patten, that he settle up all his business as soon as he possibly can, and make a disposition of his merchandise, that he may perform a mission unto me next spring, in company with others, even twelve including himself, to testify of my name and bear glad tidings unto the world.' (Doctrine & Covenants 114:1)
David W. Patten died in October of 1838 and never went on a mission that coming
spring.
There are bizarre prophesies in Doctrines and Covenants about treasures to be found in Salem, Mass. for the purpose of bailing out the then badly in debt LDS. (Doctrine & Covenants Section 111) This prophecy is at the beginning of this section.
The challenge is to get the Morman missionary willing to listen to this evidence. So far, the ones I have witnessed to have never heard it and I have never had one take notes when quoting these false prophesies. It has always been 'we will have to check that out'. I hand them a copy of the 'prophesies' as they quickly depart.