In 4 complete sentences, explain what a person means when they use the following metaphorical phrase:

"My brain turned to mush during that unit test!"

Make sure to use proper grammar, capitalization, and punctuation,

When a person says "my brain turned to mush during that unit test," they are using a metaphorical expression to convey that they struggled or had difficulty thinking clearly and processing information effectively during the test. The use of "mush" suggests a lack of coherence or organization in their thought processes, as if their brain became a formless, unstructured mass. This phrase implies that the test may have been particularly challenging or overwhelming for the individual, causing them to feel mentally exhausted or unable to perform at their usual level of cognitive functioning. Overall, the metaphor highlights the person's frustration and sense of cognitive defeat during the test.