Understanding the 'Stop' Signal Color Logic

This question involves a simple coding or substitution cipher applied to colors. We need to figure out the color of the 'Stop' signal light based on a set of rules where one color name is replaced by another.

Analyzing the Color Code

First, let's identify the standard color of a 'Stop' signal light. In traffic signals, the 'Stop' light is universally recognized as Red.

Now, let's look at the rules provided in the question:

• 'white' is called 'black'
• 'black' is called 'grey'
• 'grey' is called 'red'
• 'red' is called 'green'
• 'green' is called 'blue'
• 'blue' is called 'yellow'

Determining the Coded Color

We know the actual color of the 'Stop' signal is Red. According to the rules given:

The rule states that 'red' is called 'green'.

Therefore, if we apply this code to the 'Stop' signal light:

1. The actual color is Red.
2. The code states that Red is called Green.

So, the 'Stop' signal light, which is actually Red, would be called 'Green' under this specific coding scheme.

Final Answer Derivation

Based on the substitution rule "'red' is called 'green'", the color of the 'Stop' signal light, which is inherently Red, will be referred to as Green in this context.