It never fails. Because I write, everyone assumes I am a walking encyclopedia of grammar know-how. A spelling bee know-it-all. All day long it’s “allyah, how do you spell this” and “allyah, how do you spell that.” “allyah, should I use a colon here, or would an em-dash be better?” Okay, that’s not actually what they say: 1) I write under a pen name, and 2) they certainly know how to spell “this” and “that.” For God sake, I hope so.
The point is, I don’t have a computer chip in my head. I’m not a flowing font of information. Sometimes, my brain gets tired. There’s a lot of useless information that I carry up there, and I don’t have time to edit on the fly, sifting through all that garbage to find the one thing that someone needs on the spot when there’s an easier solution: look it up. And yes, it sucks because it takes time and effort, but what’s the alternative? Crappy copy? I don’t think so.
So use your resources, online or in print, and rely on your own brain instead of running to your “allyah equivalent.” Trust me, she, or he, will thank you some day.