Are these two sentences grammatically correct?
- Mona told me that London was the biggest city in England.
- He wanted to know where Manchester was.
I found these two sentences by chance in an exercise book published by Egypt's Ministry of Education.
Both sentences talk about a fact, and Is it unreasonable to change the verb tense in reported speech to past simple when what the sentences talks about is still true? (As my teacher and the books say.)
Or is it right when we talk about facts to change the tense or is the tense change optional and both are correct?