Amanda is completely colorblind. She sees everything in different shades of black. However, she has not been colorblind her entire life, and can easily identify what shade of color she is looking at though she can't actually see it. She just has to look closely.

One day, Amanda goes crazy and murders her husband. When Amanda is taken to court, she says that her colorblindness caused her to lose her mind. The judge decides that she should be kept in prison until her color vision comes back.
After 12 years, Amanda's color vision comes back.
How can she prove this to the judge? The judge knows that even when Amanda was colorblind, she could differentiate between colors. So, Amanda could just be lying and she can't just be tested with color-vision tests.

Amanda can prove to the judge that her color vision has come back by demonstrating her ability to accurately identify and differentiate between different colors. This can be done through various means:

1. Color matching test: Amanda can be presented with a series of color swatches and asked to match them with their corresponding colors. By correctly identifying and pairing the colors, she can show that her color vision has been restored.

2. Object identification: Amanda can be shown objects of different colors and asked to identify their specific colors. By consistently identifying the correct colors, she can establish that she can now see colors accurately.

3. Color-based tasks: Amanda can perform tasks that require differentiating between colors, such as sorting objects or arranging them in a specific color order. If she successfully completes these tasks with accurate color identification, it can indicate the restoration of her color vision.

4. Visual art appreciation: Amanda can demonstrate her newfound ability to appreciate and understand visual art that relies on color nuances. By discussing the use of colors and their emotional impact in paintings, photographs, or any other visual medium, she can provide evidence of her restored color vision.

It is important to note that while these methods can provide strong evidence of Amanda's regained color vision, they may not be foolproof. The judge and relevant authorities may still need to consider additional factors and expert opinions to ensure the accuracy of her claims.