Awesome responses yo, print-out material.
Personal experience bias When a person with influence decides that some particular problem is not worth solving, because s/he never experienced it personally. That any attempt at solving it will add cost and no value.
Analyzing fatigue: when people have done so much user studies but failed to analyze the data that they don’t see the forest for all the trees. Instead of seeing the opportunities, they shoot it down with “no users said they wanted that particular feature”. Paying no mind that it doesn’t exist so they have had no chance of even trying it.