Sentence Correction

I'm pretty sure this topic has been raised before but I can't seem to find it on the forums so if someone can answer it or perhaps link me to the relevant thread.

I was having a conversation and used "I hope you slept better than I". We began to discuss the proper usage of "than I" and "than me". We came to the conclusion that in the sentence I used "than I" was proper since "than" is a subjective conjunction between "you slept" and "I slept" (slept being left out for an idiomatic reason).

Could someone please explain to me what the GMAT test has to say on phrases/sentences that use "than I/me/pronoun"?

https://grammar.quickanddirtytips.com/th ... an-me.aspx

Grammar Girl has a great (if lengthy) explanation. Good luck!

I read that explanation before to try to find a definitive answer but the conclusion of the article supports use of "than" both, as a conjunction ("than I") and a preposition ("than me"), in certain sentence constructions. I want to know what GMAT would decide in an ambiguous sentence, such as "She is wiser than me" and "She is wiser than I". The article concludes that I can use either in this situation. I presume the GMAT will not be so forgiving.

Your best bet is to find a couple of examples in the OG and see what GMAT specifically favors.