The first one can be seen either way. For me, I saw a vase first. In all of the pictures, the black drawing is considered the positive space and the white background behind it is considered to be the negative space. If you look at the vase picture again and imagine the background to be the black portion, you see two faces.
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B. Bass as a singing category is pronounced Base.
The answer is "as an ancient sacred sign used in many cultures to symbolize good fortune."
The objects would look as if they were looking up and down adding a bit of perspective.
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