“We don’t know” comes in many forms. For example, the car mechanic quizzed about a part failure often states they don’t know why it failed. The heater-air conditioner technician told me two weeks ago that he did not know why the blower motor was leaking oil. “It’s old.” Children who spray-painted the car are asked why often retort with “I don’t know.” Then there are medical doctors.
“Doctor, I was cutting vegetables. My right wrist, elbow, and shoulder hurt painfully with each cut. So much so that I had to stop.” The doctor looked at his computer, “That’s a great question.” The comment ‘that’s a great question’ is like, “We don’t know.” Of course, the pain could be tendinitis, Carpal Tunnel Syndrome, or “You sleepwalk and play drums all night.” A lot of times, doctors don’t know.