(my personal experience) 80% of the time, do both is the wrong choice. 20% of the time, it's the right thing. So say no 80% of the time and say yes less than 20

(my personal experience) 80% of the time, do both is the wrong choice. 20% of the time, it's the right thing. So say no 80% of the time and say yes less than 20% of the time.