On false predictions

Many groups who make false predictions simply revise their history to claim they didn't.

One well-known group deletes and edits published articles from their archives--they've been doing it for over a century, and although there is some attrition each time, the majority of lemmings swallow it whole.

Blackwhite.

Here's an example of a deleted article.  Because truthiness rocks. ;)

Here the church is claiming the year 1975 will be very significant, and "possibly" Armageddon.  They said that over a dozen times previously too--all whitewashed.