I would like another phrase instead of "for that reason."
closed as not a real question by Noah, David Schwartz, F'x, Matt Эллен, RegDwighт♦ Nov 5 '12 at 10:56
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If you are proposing to use "for this purpose" in place of "for that reason", then I think you will have difficulty.
My first interpretation of "for this purpose" refers to a function or a process to be carried out. I would use it in sentences such as
In neither case, could "that reason" be used instead.