Should I make advances on a coworker although the probablility that she rejects me is almost 100%?

She is a model, she is taller than me, she is older, she is absolutely one of the most beautiful women I've ever seen. She also has a lovely personality. She is single, so this definitely means her standards are very high. I can't really imagine how she could be attracted to me. I'm quite an average looking guy, I have an entry level job. I'm not there yet.

Should I make advances on a coworker although the probablility that she rejects me is almost 100%?
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