Trivially obvious to the most casual observer

[Walter Bright via Digitalmars-d]

On 5/9/2017 1:12 AM, Ethan Watson wrote:
So, as Walter would say, "It's trivially obvious to the casual observer."

I was surprised to learn at DConf that "trivially obvious to the most casual 
observer" was an unknown expression. Googling it shows only around 10 hits, none 
predating 2005.

I learned it at Caltech in the 1970s, where it was applied to concepts and 
proofs that were exceptionally difficult to follow.

I suppose that from now on if you hear the phrase, you can conclude that the 
source is from the set of:

1. techers

2. D programmers

:-)