Some folks would do well in a spellin' bee, others would not. This may or may not have to do with long term memories. However, this isn't the point, IMO. Dictionaries and software programs aren't allowed in such settings. They are allowed on SI, and dare I say their use is encouraged?
Folks should use 'em, sez I.
When they don't, nine times out of ten they're either lazy, inconsiderate, or worse. It's kind of like going out into public without having showered for a week, IMO. Occasionally there is a good reason for doing this (e.g. when you return from a long camping trip, suffer a severe case of eczema, have major surgery, lack education with respect to hygiene, yadda yadda). Usually however the individual is lazy,inconsiderate, or simply feels like giving the finger to the world.
Now where the heck did I put my shampoo.... :-)
Anaxagoras |