Read!
They say that two heads are better than one. The more minds you put together to solve a problem, the better the solution you guys can come up with. Now, imagine adding an additional head into the mix. There’s no problem that’s left unsolved as long as three minds join forces.
Unless you introduce a high-tech electric candle to three of the OP’s aunts. It took the three women far too long to realize that the wick doesn’t actually require fire to light up. They would’ve solved the problem quicker had they examined the candle from every angle.