Image Surface is what remains when everything has disappeared from it.
This is the first sentence of Manfred Sommer in his book "Von der Bildfläche: eine Archäologie der Lineatur".
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SOMMER, Manfred, 2016. Von der Bildfläche: eine Archäologie der Lineatur. Berlin: Suhrkamp. ISBN 978-3-518-58683-9.
After working with Laws of Form for over a decade, William Bricken learned to recognize the depths to which Spencer Brown had deconstructed our notions of Truth and Rationality.
Single concept system, see Containment
Void-equivalent forms are syntactically irrelevant and semantically inert.