The task they were being asked to do was to stoke the metaphorical boilers with coal that we will deliver to them. However, we will deliver it to the right side of the boilers and they want it on the left. (Metaphorically). Where we deliver it is constrained by the supplier of the coal - we have no choice. They then proceeded to bleat on about how can they possibly estimate the effort involved when they have never shovelled coal from the right. It's too difficult. It can't be done.
By this point the Gorse Fox was teetering on the edge, and a red mist was rising. He interrupted the call
"Excuse me. Starfleet is the greatest technology company on the planet. You are using boilers that Starfleet designed, on Starfleet premises. You are stoking them with coal that Starfleet produced using the tools that Starfleet built for the job. Stop making excuses."There was a brief silence, and one of them (probably the shop-steward) had the temerity to ask "On what do you base that assertion?"
"Forty-two years of experience working with and designing these boilers! Any more questions?"
It went very quiet... and normality was restored. The stokers decided they might be able to shovel the other way round, or even move the coal to where they wanted it.
There are times when the thought of retirement becomes overwhelming.