[wbartley]

This was from the interstate 12-board with BEN

https://tinyurl.brid...se.com/3h2dtddr

It's hard to imagine any sort of training data set would trigger bidding 3D rather than 3C. Seems like the set of metrics being computed needs some work. Either that or a much larger data set.

[P_Marlowe]

He may not have expected a T/O with the hand you did hold.
I agree bidding the longer stronger suit is more rational, but ...
you cant change partners bid, he may have planned to bid clubs later,
you have influence over your bid.

[dsharpcctx]

As a bridge teacher, I would have my students bid their longest suit in this situation (in North's seat) since you prefer clubs to diamonds. A responsive double is a possible alternative since North has both minors. A responsive double shows both minors in this situation since North would bid spades (or cue bid) with a 4 card or longer spade suit.