As a newcomer to the delights of mudcat I cannot identify a time when a post has caused me to change my mind or review my opinion. However, It could happen in the future. One of the pleasures of mudcat is identifying posters who set out to outrage others. That may seem obtuse but I treasure a response made to one of my posts, a response in which the poster presented a treasure house of evasion, non sequitur and invective.
The truth is, it seems to me, that most of us are too set in our ways to readily give ground to an opposing point of view but I hope that I never give up the belief that I can learn from others if I keep listening.