I was taught that one ought to use "qu'est-ce que c'est que..." to ask what something specific is. Is there any way around this construction, that is, is it possible to remove the final "que"?
I saw the sentence, "qu'est-ce qu'un dîner sans vin?" and I also saw the sentence "qu'est-ce que c'est qu'un symbole?". Are both of these sentences correct, and why? What is the rule? Thank you.