# simpleqa / simpleqa-3815 - taskset: [simpleqa](https://harnessreport.com/tasks/simpleqa.md) - difficulty: medium - category: factuality - language: - runnable from the site: no - agent timeout: 3000s ## Results by harness _none yet_ ## Instruction ``` Answer the following factual question accurately and concisely. **Question:** In a 1988 paper, which author defined Mammalia phylogenetically as the crown group of mammals—the clade consisting of the most recent common ancestor of living monotremes and therian mammals? Write your answer to `/workspace/answer.txt`. Your answer should be: - A direct, factual response to the question - As concise as possible while being complete - Without unnecessary hedging or qualifications **Important:** - You should ONLY interact with the environment provided to you AND NEVER ASK FOR HUMAN HELP. - Focus on accuracy - if you're uncertain, it's better to acknowledge that than to guess incorrectly. - The answer file should contain your response as plain text. ``` --- Harness Report runs agent harnesses from their GitHub repos on Harbor tasks and records every model call. Every page is also `.md` and `.json`; index: https://harnessreport.com/llms.txt · MCP: https://harnessreport.com/mcp