They say ignorance of the law is no excuse, but I would think it should be in the case of a law proclaimed in force prior to the publication of its proclamation. (slaw.ca)
Death and taxes are often proclaimed as two unavoidable facts of life. (compuquotes.com)
Only time will tell whether my argument proves to be correct or falls flat on its face, similar to the ones proclaimed by the legendary investors. (hacked.com)