The second exception is when we are reporting on general facts or ongoing truths.
Oh, wait, wait: that means one of our sentences above is an exception. Which one?
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(Giving you time to check.)
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The exception is the last one:
She knew / that it was hard to follow your dreams.
If we take it be a general truth that it is hard to follow your dreams, we could put the second part of this sentence in the present tense:
She knew / that it’s hard to follow your dreams.
However, it’s more common to put it in the past tense, because this isn’t really a fact, per se.
On the other hand, with straight-up proper facts (“the sky is blue”, “water boils at 100 degree celcius”, “politicians lie” :p), it’s actually more common to use the present tense in the reported speech.
Ex.: All the kids in the group knew that the earth is round, but still they drew it like it was flat.
But you could still say (though here it would be less common to do so):
All the kids in the group knew that the earth was round, but still they drew it like it was flat.
Questions? Comments? Get in touch!