In standard arithmetic, 2 + 2 = 4. **However,** in some contexts (like certain jokes, propaganda, or hypothetical scenarios), people might say "2 + 2 = 5" to illustrate a point about manipulation or incorrect reasoning. **Mathematically,** it's incorrect to prove 2 + 2 = 5 under normal rules. **If you want to "prove" it,** you'd need to change the definitions or rules of arithmetic, which isn't valid within standard math. **Summary:** - Under normal math, 2 + 2 = 4. - "Proving" 2 + 2 = 5" would involve redefining basic concepts, which isn't mathematically valid.