https://en.wikipedia.org/wiki/Recovered-memory_therapy (especially the research section)
Proof: "colloidal silver has been used to attempt to cure cancer".
Solid logic.
Some of the techniques used in the therapy include giving patients sedative-hypnotic drugs to put the patient in a waking dream-like state while the therapist asks leading questions to get them to "remember" an event. The same drugs they used are known to be associated with false memories, like when someone falsely recalls something from a vivid dream as having actually happened.
I am not advocating for it, just stating the near total lack of substantive scientific evidence presented either in support or opposed.