Knowing each others next move e.g. being on the same WAVELENGTH is one thing but being on the same DAVELENGTH is much more unique.
One could say it is essentially a hive mind of intellectual superiority... but one could also say it is also the complete opposite.
Person A - "Alright guv shall we crack on with this work in this specific manor?"
Person B - "Yes."
Person A - "I see we are on the same Davelength me old china."
