I use the ATIS as a guide, but I, as the captain, make the call on the runway state.
I have inspected a runway on many occasions that is wet for maybe the first 50 meters then dry for the remainder. You as captain would see the wet section and not necessarily be able to determine the rest of the runway state. The same would apply if you could see a dry third and the rest were wet. Hence my question on reporting thirds. Would you use wet settings if
any third of the runway were wet in whatever combination?
I am not disputing your responsibility for the final call, I am just trying to understand the situation from the captains seat to improve my own knowledge and hopefully be of more help in these circumstances.