I have trouble distinguishing the computer voice saying "ligger" vs. "liker". I can always tell which it is from the context, but I am wondering, should a "human" voice make these two words sound more different? Or, are the middle consonants so clipped that you can't really tell the difference?
Lying is the correct verb, not laying. Here are their correct definitions:
Lying — put (something) down gently or carefully. Laying — (of a person or animal) be in or assume a horizontal or resting position on a supporting surface.
Keep in mind that they are both different verbs. Although they might seem similar, nobody should be confusing them.
You're right, they are different verbs. Also, perhaps the most striking difference is that "to lay" is a transitive verb requiring an object, while "to lie" is not. If you use "lay" and don't supply an object, then you've used it incorrectly. For example, you can't "lay in bed", but you could "lay yourself in bed" ("yourself" being the object). Take the first line of the classic children's prayer "Now I lay me down to sleep". If you remove the word "me" (the object), it becomes ungrammatical. But it is grammatical to say "Now I lie down to sleep".