I'm curious as to whether there is some implicit/explicit etiquette re writing an almost-identical answer just a few minutes after a previous one. I'm thinking about the issue in general, but the issue came up re this question:
Linear Dependence Of A SumLinear Dependence Of A Sum
I gave my answer just 2 minutes after Sami's answer, and no votes have been made. Is it considered etiquette to just delete my answer, since it seems to contribute little to answering the OP?