Most women can't. Not all women have tashes. Most women don't have the hair growth on their neck, chin and cheeks. We have "peach fuzz" which is basically a normal covering of hair (because we are mammals) but it's fine and only seen if you are very close and looking in the correct light.
Unless she is abnormally high in testosterone, she won't be able to grow one.
You don't need to cuss us out. Different health problems and genetic anomolies can cause excessive facial hair. Polycystic Ovaries, hirtuism (sp?), estrogen dominance, testosterone imbalance, and whatever is to be discovered can create this issue in women. If you see a woman with a serious beard, don't say anything. Maybe she could win against you in a fight.
Well technically we ALL have facial hair. Hair covers all of our body. Its typically very fine light colored hair that you can't see (peach fuzz) Some women have longer darker hairs. This can just be genetic or caused by hormonal imbalances and such.