Something weird happened to me on Wednesday evening. I was walking back to my hotel from our site in Cambridge (in the UK) and I got lost. I knew I was lost because Google Maps on my phone said, you are HERE but I knew I wanted to be THERE. Apparently it is common to get lost in Cambridge.
So, I'm standing there on a street corner, trying to figure out which road I should go down to get from HERE to THERE, frowning so hard my glasses nearly loose purchase and fall off my face, when a woman on a bicycle pulls up next to me and says, "Can you ...".
And without letting her finish I said, "I'm sorry but I'm lost too.'
She said, "Oh ... do I look lost?"
I said, "Yes", but I didn't ask her if I looked lost too because that would have made her look stupid for stopping and ask me for directions.
She said, "Oh well, thanks."
I said, "No problem. But ... just tell me ... where are you trying to get to?"
"The railway station."
I said, "Oh. I think if you go straight to the next corner, turn left, then keep going you'll find it."
She said, "That's what I thought" then cycled off.
And I thought, well Clarke, if that is the station, then I should go down THAT street to get to my hotel.
Which I did and it turned out, 5 minutes later, that I was wrong.
And yet: bewilderingly, I checked later and the railway station was where I said it was.
We have a number of legacy QTP regression tests which sometimes pass and sometimes fail.
I think we know less by having them.