20:4120:41, 17 February 2015diffhist−278
Wedge (symbol)
Actually, this symbol wasn't even used by Russel & Whitehead, they used a dot as conjunction and called it the logical product
20:4120:41, 17 February 2015diffhist−278
Wedge (symbol)
Actually, this symbol wasn't even used by Russel & Whitehead, they used a dot as conjunction and called it the logical product