The NOT node is a Boolean NOT. It inverts the logical value of its child-node from true to false or false to true. Because NetWeaver uses fuzzy math the NOT node also inverts fuzzy trueness values.

• Minimum number of child-nodes: 0
• Maximum number of child-nodes: 1
• Valid input range: -1 to +1 (false to true)

Because NetWeaver uses a range of -1 to +1 to represent false to true, the NOT node's value is simply calculated by flipping the sign of its child-node.

value = -value₁