premise: How to bend rebar<br>Understand the structural issues possible with manually-bent rebar and know how to avoid them. When you bend metal, you naturally weaken it. When done correctly, however, you can minimize damage and still get the shape you need to complete the project.
hypothesis: Metal is used for human projects.
reason: This is definitely correct because this is saying how metal can be used for human projects (projects that humans do). The bot was probably confused by the way I phrased it. 