[mnsc]

My point is that the mediator shouldn't make the decision that is not in the role. If the deadlock is concerning i.e. two competing architectural decisions the mediator should help the different people with architect roles engaged in the debate to decide how to move forward.

Trusting that a single Tech Lead always will have the right context to authoritatively decide the best way forward seems naive to me. Where is this magical person?

[zaphar]

The same place you find two people who can by consensus arrive at the best decision moving forward. The point of breaking a deadlock isn't that you choose the best choice but that you are able to make a choice which is strictly better than making no choice.

[gohrt]

Trusting that a pair of engineers will always come to an agreement to authoritatively decide the best way forward seems naive to me. Where are these magical people?