There should be no argument. 0.9999... = 1. They're the same thing. Red is red. Blue is blue. Water is water. 0.999999... = 1. Take an Introductory Analysis class, where "infinity" is treated rigorously so that some of you "logicians" can't make up weird, subjective arguments.
The funny thing is that the people trying to dispute it are taking a condescending attitude, as if they know better. If you're going to go against the established knowledge in mathematics, of all things, then at least be humble about it.







