Okay, my favourite couple:
1) A contract isn't just a piece of paper that you sign that says contract on it. A contract is any agreement between two or more parties, whether verbal, written, or even just implied. The reverse of this is also potentially true; just because you've signed a paper contract saying you will do something, you might not legally have a contract because there was never any expectation or obligation between the two parties to do the thing on the paper.
2) The gender pay gap is mostly not a result of blatantly sexist bosses or employees harassing women. Nor is it because women have some instinctive preference for worse paying jobs. It is most commonly a product of a broader society, which passively advantages men and disadvantages women (i.e a gendered culture which teach people from birth what jobs, activities, behaviours etc. are "men's" and "women's"). People have a choice as to what career they want, but that choice is subject to a tremendous influence by that person's upbringing. People who try to argue that women just naturally aren't inclined to apply to STEM jobs or construction mysteriously ignore those places where there are a near equal number of women in STEM jobs or construction (as is the case across central and South Asia, respectively).
3) Blood is never blue. Your veins are depicted as blue in diagrams, and both veins and arteries look blue through the skin, but your blood is always red. Oxygenated blood looks a bit brighter, but that's the only difference.
4) My wife is my wife, even though she doesn't share my surname. She also is Indian, despite having a stereotypically English sounding name. She also is Catholic, despite the presumption that all Indians are Hindu/Muslim/Sikh. She also is fine with contraception and stem cells, despite being a Catholic.
