LIke I thought earlier, are we defining a watch or exist? I think the key word intimated was exist, and when did a watch begin its existance. It only exists as a watch, because humans have placed a name on everything. We know it as a watch when we recognize it. Every other living thing, has no idea a watch is called a watch, or a table is called a table, or if you spank the dog and yell "get off the couch", even knows the difference between a table or couch.
I think the mixing of words is in the part of speech it is, and how the word is used. An object exists because it is named and recognized, by humans who have assigned it to some mental catagory. When a human takes a walk, he knows what is a tree, a building, a rock because we have educated ourselves to their assignment of terms, that all are defined. If a dog takes a walk, they are all just places to lift his leg on, and could care less what they are. He doesn't know thier names, or what they are. He learns simple things, like knowing he can not climb a tree, and he can walk into buildings, and knows his food is not up the tree, its in the building with his bed.
Objects only exist as their names in the minds of humans, which are names of things, and Nouns. To exist is an action word and a verb, a state of doing something, such as existing as the reaction of breathing, eating and sleeping. All things exist, even if they are inanimate objects like a watch, car, or bridge, they exist becasue we gave them a name and know them as such. Human existance and the act of existing, is not the same thing, where life has to be sustains by a biological process. Life begins with Conception and life is existing within the Mothers womb. It is being formed while nurished by Mom. When it is ready to sustain life outside the Mom, birth occurs, and when it is ready to sustain life on its own is wiened. After a long life cycle(hopefully) death occurs. Objects do not have these abilities or existance, their existance is only the product of human assignment of their titles and names. A mechanical function of an object, is also not an example of life.
Notice I have not brought into this religion or the soul Humphreys. It is my believe that human have a soul from Conception, but that is aside for the terms we are defining.