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With a sheer organza overlay, this mock neck frock is a gorgeous semi-formal winter wedding guest outfit that'll have everyone asking where you shop

Her choice of dress for the occasion has gone down in the annals of fashion history as one of her greatest: an icy, powder-blue, diaphanous tulle gown by her frequent collaborator, Catherine Walker, featuring a chic scarf that she tied behind her so that it flowed as a train

Its uncomplicated and effortless, but will always leave you looking put together

A few days later, on 26 February, McNeill reposted the image to her blog on Tumblr and posed the same question to her followers, which led to further public discussion surrounding the image

Three studies published this week in the journal Current Biology set out to understand how a single image can be interpreted so differently by so many people