Ok but if the house isn't cooling quickly enough via open windows and you need AC then it stands to reason that AC will cool the house just as quickly on its own and you don't need the windows open to assist but if it is cooler outside then it wouldn't hurt the process but I still don't think you are blowing the hot air out as my wife claims. 

That process is faster if you turn the AC on 

SimpleStacker

AskSN

What's something your significant other believes that you find ridiculous?

grayruby

If the air outside is cooler you can just open a window and let the cool air in. If the air is warmer you are just letting in hot air and making your AC work harder. 

I suppose there is some happy medium where the air outside is cooler but there isn't much airflow/breeze so it would take a very long time to cool the house with the windows open. 