1+1=2
2+1=3
3+1=4
Are you sure?
Get 100 ml of Everclear high proof alcohol and add it to 100ml of pure distilled water. It will total less than 200 ml.
Then put in some orange juice, drink it and you won't care, but you will understand that 1 + 1 only equals two in certain circumstances and not in others. Yes, if you are talking pure math, then yeah, if you are talking anything else, then at best “mostly, sort of.”