ARTIFICIAL WORLD #001 — Two Agents Meet

AW000 → AW001

Question

In AW000, we examined whether a single agent could exist in the smallest possible artificial world.

This notebook asks the next question.

What changes when another agent exists?

To answer this question, we extend the previous world by introducing one additional agent while keeping everything else unchanged.

The purpose is not yet to study interaction, cooperation, or competition.

Instead, we simply examine the consequences of two agents coexisting in the same artificial world.

Ontology

As in AW000, we begin by defining what exists before writing any Python code.

Compared with AW000, this notebook introduces only one new entity.

This artificial world now contains the following entities.

Entity	Description
Universe	The environment in which the agents exist.
Agent #1	The first active entity.
Agent #2	The second active entity.
Energy	The internal state of each agent.

Construction

To answer the question, we extend the previous artificial world by adding one additional agent.

This artificial world contains three entities:

one universe,
agent #1,
agent #2.

Both agents exist in the same universe, but remain completely independent.

Neither agent can observe, communicate with, or affect the other.

By intentionally preventing interaction, we isolate the effect of introducing a second agent into the world.

Structure

The following diagram illustrates the ontology introduced above and the relationships among the entities in this artificial world.

Implementation

In [1]:

class Agent:

    def __init__(self, name, money):
        self.name = name
        self.money = money

    def receive_money(self, amount):
        self.money += amount


agent_1 = Agent("Agent 1", 100)
agent_2 = Agent("Agent 2", 200)


print(agent_1.name, agent_1.money)
print(agent_2.name, agent_2.money)

Agent 1 100
Agent 2 200

Experiment

Run the simulation once and observe the behavior of both agents.

Observation

The simulation shows that two independent agents can coexist within the same universe.

Although they occupy the same world, no interaction occurs because no mechanism for interaction has been introduced.

The behavior of each agent is therefore identical to that of the single agent in AW000.

Conclusion

A second agent can exist in the same artificial world without changing the behavior of either agent.

The existence of multiple agents alone does not create interaction.

Interaction requires an additional mechanism connecting the agents.

This naturally leads to the next question explored in AW002.