Oh, I've seen that before.

"Hey AI, please come up with an efficient mass transit vehicle for the modern age."
"Trains."
"Um... no, we need a modern approach that maximizes throughput and--"
"Trains."
"No. How about pods with people inside--"
"On cheap infrastructure with low friction steel wheels and coupled together. Trains."
"It's not letting us push our agenda, this isn't going to work. Hey, other AI..."