According to the sources, the detection of “weak signals” or outliers is primarily an emergent artifact of the observer’s “net”—the specific distinctions, expectations, and boundary judgments used to frame the inquiry—rather than a direct property of individual sensory capability[1].
While individual sensory capability provides the necessary “irritation” from the environment, the sources argue that this input only becomes “information” when it is processed through a system’s internal structures[5].
1. Information as a System-Internal Product
In Luhmann’s framework, information is defined as a “difference that makes a difference”[1]. This means that information does not exist “out there” in the environment to be picked up; rather, it is produced entirely inside the system[10][11].
• Expectation as the Filter: A signal is only “weak” or an “outlier” because it is measured against a background of established expectations[2][12].
• The Possibility Space: Every system creates its own “possibility space” (range of options); a signal only acquires meaning when it is selected from this internally generated range[10][12].
2. The “Net” of Distinctions and the Blind Spot
The “net” refers to the distinctions an observer uses to slice reality[3][4].
• Selectivity of Observation: Nothing can be observed without a distinction, and every distinction is asymmetrical—it indicates one side while leaving the other side (the “unmarked space”) invisible[3][13].
• The Blind Spot: The distinction itself is the observer’s “blind spot”[4][14]. The observer cannot see that they cannot see what they are not looking for[15][16]. Therefore, an “outlier” may be missed entirely if it falls into the unmarked space of the chosen “net”[13][14].
• Station Points: The “station point” of the observer (whether they are an internal or external observer) determines which differences are processed as relevant information and which are ignored as “noise”[17].
3. Sensory Capability vs. Systemic Irritation
Sensory capability belongs to the psychic system (consciousness) or biological substrate (the brain), which are operationally closed to the social system[5].
• Narrow Bandwidth: The brain and senses have a “narrow bandwidth” of sensibilities to protect the system from being overwhelmed by environmental complexity[20].
• Irritation, not Transmission: The environment cannot “communicate” with a system; it can only “irritate” or “perturb” it[6]. Individual sensory capability merely provides the raw “noise” from which the system’s “net” must then construct an outlier or signal[19].
4. Boundary Judgments as Framing
The boundaries of a system are not physical but are constituted by the system’s own operations[26].
• Canalization: Boundary judgments (structural couplings) act to canalize causalities, filtering out the vast majority of environmental events so the system can focus on a narrow area of influence[29][30].
• Framing the Inquiry: By deciding what is “included” and “excluded,” the observer’s boundary judgments determine what can even be perceived as a disturbance or a signal[31][32].
In summary, the detection of a “weak signal” is a constructive achievement of the observing system[12][33]. It is the system’s own internal complexity and its “resonance capability” that allow it to transform an external disturbance into a meaningful outlier[22][34].
How do you think this perspective on “weak signals” might change the way organizations approach risk management or strategic planning? Would it be more beneficial to improve sensory technology or to diversify the “distinctions” used by the analysts?
References
[1] [Book] Luhmann - Introduction to Systems Theory.pdf [2] [Book] Luhmann - Introduction to Systems Theory.pdf [3] [Book] Luhmann - Introduction to Systems Theory.pdf [4] [Book] Luhmann - Social Systems (Writing Science).pdf [5] [Book] Luhmann - Introduction to Systems Theory.pdf [6] [Book] Luhmann - Introduction to Systems Theory.pdf [10] [Book] Luhmann - Introduction to Systems Theory.pdf [11] [Book] Luhmann Gilgen - Introduction to System Theory.pdf [12] [Book] Luhmann - Introduction to Systems Theory.pdf [13] [Book] Luhmann - Introduction to Systems Theory.pdf [14] [Book] Luhmann - Introduction to Systems Theory.pdf [15] [Book] Luhmann - Introduction to Systems Theory.pdf [16] [Book] Luhmann - Introduction to Systems Theory.pdf [17] [Book] Luhmann - Introduction to Systems Theory.pdf [19] [Book] Luhmann Gilgen - Introduction to System Theory.pdf [20] [Book] Luhmann - Introduction to Systems Theory.pdf [22] [Book] Luhmann - Introduction to Systems Theory.pdf [26] [Book] Luhmann - Introduction to Systems Theory.pdf [29] [Book] Luhmann - Introduction to Systems Theory.pdf [30] [Book] Luhmann - Introduction to Systems Theory.pdf [31] [Book] Luhmann - Introduction to Systems Theory.pdf [32] [Book] Luhmann - Introduction to Systems Theory.pdf [33] [Book] Luhmann - Introduction to Systems Theory.pdf [34] [Book] Luhmann - Introduction to Systems Theory.pdf