A few months ago a coworker asked me to proofread a memo. He had used E.g. twice. I corrected him and replaced the second E.g. with I.e., which was called for by the context.
He ignored this correction. When I asked him why, he said that he thought I was just trying to use one of each, and he preferred to be consistent by using the same throughout. He had no idea they had different meanings.
I shared with him the Latin meanings and haven’t seen him make a mistake since.
I, too, use a test when deciding which use, but I keep with the original 'That is' rather than 'In other words'. It works well for me.
[tt]-John[/tt]
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