What is it about dandelions? Like Carmi says they show up virtually overnight. Are they an unwelcome guest in your lawn? Does it become a personal war against them? What approach do you take? Do you take that forked prong designed specifically for this species- dig in deep to 'pop' that long tap root with a smug 'I gottcha' or resort to chemical warfare?
I'm here to tell you that battle is won before it began. There will always be dandelions.
There are some wonderful quotes about weeds. my favourite is 'but make no mistake: the weeds will win; nature bats last' Robert M Pyle