Every solution breeds new problems.
Enough research will tend to support your conclusions.
The Ninety-Ninety Rule of Project Schedules - the first ninety percent of the task takes ninety percent of the time, and the last ten percent takes the other ninety percent.
A failure will not appear until a unit has passed final inspection.
Every clarification breeds new questions.
The universe is simmering down, like a giant stew left to cook for four billion years. Sooner or later we won’t be able to tell the carrots from the onions.