Test question:
How would you say «This computer works the best»? Cet ordinateur marche ________.
The answer is given as mieux.
But the lesson says:
Use meilleure when qualifying something as good/better/the best at what it does, i.e. efficient/practical, or good/better/the best in taste (food):
Quel est le meilleur aspirateur?Which is the best vacuum cleaner?
Why is it right for a vacuum, but wrong for a computer?