I have questions for the Magos Biologis and the Adeptus Mechanicus out there.
My first question is, why are the Tau seemingly immune to Chaos influence since we haven't heard any true report in the lore about a chaos worshiping Tau?
My second question is theoretically, are Tau currently technologically capable of reducing and eliminating warp breaches in space-time? Perhaps a series of colossal space-born structures that repel ambient warp energy back to the source, effectively shielding the material universe from the immaterial. Or maybe on a smaller scale, a black hole device fired into the immaterium and literally sucks the warp anomalies closed.
My third question is, what do the Tau do when they encounter something as dangerous and infectious as a Chaos Demon incursion or a full fledged Demon World? Since they don't have any Exterminatus procedures, do they just say meh and move around it or do they find a means to engage and save the world from Demon infestation?
My fourth and final question is, what do the Tau see Chaos as in a philosophical way? Like Confucius say, man who go to bed worshiping Nurgle wake up with rotty finger.