threshold-1outof4

At least 1 of 4 inputs high. Equivalent to 4-input OR gate.

Function

1outof4(a, b, c, d) = 1 if (a + b + c + d) >= 1, else 0

Equivalently: OR(a, b, c, d)

Truth Table

a	b	c	d	sum	out
0	0	0	0	0	0
0	0	0	1	1	1
0	0	1	1	2	1
0	1	1	1	3	1
1	1	1	1	4	1

Architecture

Single neuron: weights [1, 1, 1, 1], bias -1

Fires when: a + b + c + d - 1 >= 0, i.e., sum >= 1

Parameters

Inputs	4
Outputs	1
Neurons	1
Layers	1
Parameters	5
Magnitude	5

Usage

from safetensors.torch import load_file
import torch

w = load_file('model.safetensors')

def atleast1of4(a, b, c, d):
    inp = torch.tensor([float(a), float(b), float(c), float(d)])
    return int((inp @ w['neuron.weight'].T + w['neuron.bias'] >= 0).item())

print(atleast1of4(0, 0, 0, 0))  # 0
print(atleast1of4(0, 0, 0, 1))  # 1

License

MIT