Square root of -1 Memes

Mathematicians really said "We can't solve x² + 1 = 0? Fine, we'll invent a whole new dimension of numbers." Then proceeded to build entire branches of mathematics, electrical engineering, and quantum physics around this made-up solution. Classic human behavior: create an unsolvable equation, refuse to accept defeat, invent imaginary friends for numbers, then use them to build MRI machines and smartphones. The square root of our stubbornness is indeed √(-1).