Aer: I'm consistent, but I don't always give the most complete possible answer. I tailor my answers to the audience, so as not to swamp people with unnecessary or confusing details. If they require clarification, I'm happy to give it. Sometimes it is better to sacrifice absolute accuracy for clarity. I don't know what you're referring to here. The right tools for the right job, Aer. I've already explained that to you, above. Do you still have questions? If so, ask away. 1/0 is undefined for integers or real numbers. When v=c, γ is undefined, not infinite. v=c is not an approximation, either - it is exact. No. I think you're arguing for the overthrow of relativity because you say relativity is BS, and you've said so.