X2 ... redundancy can definitely kill participation especially when you know what the outcome of a conversation or debate will be.
Some of the "irrefutable" conclusions form years past:
"There's only one ethical form of fishing. Casting a dry fly upstream to feeding trout."
"Stop blaming sporties and commies. Look at all those nets in the river. Who do you think put them there?"
"Nothing can ever be done without more enforcement."
"Not all coho and steelhead with an adipose fin are wild."
"The river is ALWAYS fishable if you know where to look."