So after thinking about it for the past 45 minutes, I don't think I ate breakfast today, nor do I recall stopping at any of the traffic lights that I would have

So after thinking about it for the past 45 minutes, I don't think I ate breakfast today, nor do I recall stopping at any of the traffic lights that I would have had to stop at on drive this morning. But I recall a shell script maybe a decade ago that behaved differently between POSIX compliant shells due to the differences in how they handled processes in a pipeline. That's when I discovered POSIX was not unambiguous.