1) Ch. 18, v. 2,3: "V'hi'nei shloshoh anoshim, Va'yomer A-DO-NOY" And behold three men, And he said A-DO-NOY There is a false theological concept of trinity, that there are three combined spiritual powers/beings that combine into becoming one deity, hence tri-nutty. They bring a proof from these two verses. Three people came in front of Avrohom and he addresses them as one and calls them a-do-noy, one.
This cheap bit of theological logic is readily rebutted in a few different ways. How?
2) Ch. 18, v. 24: "B'soch ho'ir" Within the city Why here when requesting clemency in the merit of 50 righteous people did Avrohom say "b'soch ho'ir," and when he asked even in the merit of 45 he said "shom?"
3) Ch. 19, v. 24: "Gofris vo'aish" Sulfur and fire What else destructive came down from the skies?
4) Ch. 20, v. 12: "V'gam omnoh achosi vas ovi hee" And also in truth she is my sister the daughter of my father Why does Avrohom explain his misleading words here to Avimelech, and by very similar circumstances with Paroh (12:19) he makes no attempt to explain?
5) Ch. 20, v. 15: "Hi'nei artzi l'fo'necho batov b'ei'necho sheiv" Behold my land is available to you in the area that is best in your eyes reside Contrast this appeasing offer with Paroh's abrupt send-off, "Hi'nei ish't'cho kach vo'leich" Here is your wife take her and go (Breishis 12:19). Why the difference in response?