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It's actually constructed from a minus sign, two question marks (rotated and one flipped on the horizontal axis) and an exclamation point (which I shrunk down to be a bit shorter than the original font size but the same width).
Symbolically, it's how many of us come from a base of negativity (negative sign); grow into open and questioning mentality (question marks with open space in the middle); and then discover our own truths to proclaim (exclamation point). (Serena, do NOT comment just to correct my punctuation, I'm typing in a hurry!)
Unbiased opinion of my own work... my mind goes a bit into the gutter when I look at this... Not sure how I actually feel about it artistically/aesthetically. Comments greatly appreciated! This is a "first draft" of the image, created in about 10 minutes when I should have been doing other things while Liam was sleeping.