It takes courage to say, "What if the angles in a triangle didn't add up to 180 degrees?" or "What if there were a square root of negative 1?" or "What if there were different sizes of infinity?"
Hay que ser valiente para decir, "¿Y si los ángulos de un triángulo no sumaran 180 grados?", o "¿Y si hubiera una raíz cuadrada de -1?, o "¿Y si hubiera distintos tamaños de infinito?".