Originally Posted By: dalehileman
Included under unnecessary expressions are phrases such as "In my opinion", "but I think that....", "However in my own experience....", "It seems apparent to me that...." etc etc

..since if it weren't your opinion you wouldn't assert it

That's my opinion

Dale, I am not sure what prescriptivist rule about these phrases you are referring too. the word tautalogy seems to be a descriptor rather than a rule.