I am confused with the usage of " or " . Here is two sentences that confused me;

i) He obviously doesn't have a plan, or he would have said something.
ii) He obviously doesn't have a plan, or would have said something.

I have taught that the second sentence is more advisable than the first sentence, yet grammar book which I studying from doesn't say so. Isn't the second "he" unnecessary? I don't know whether in English there is a incoherency due to using objects which are unnecessary.

  • Or is a poor choice here. The idea is one of logical deduction and exclusion. In casual usage, you might hear or, or else, because, for, since, or otherwise. The latter four require he.
    – Phil Sweet
    Sep 1 '17 at 13:42

"Or" in these examples is not a logical connective: it is more than that. It has the meaning "Or else", and introduces a deduction. The meaning is something like "I know that, because otherwise ... "

If you did not repeat the subject, it would read like a (rather odd) logical connection.

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