We map the reasons behind every idea -- so you can see both sides clearly
Any statement that people can agree or disagree with.
Why is it true? Why might it be wrong? Every reason gets listed.
Rate each reason yourself. The overall strength shows how well the idea holds up.
Live Example
“Free will is an illusion”
“Brain scans show decisions happen before we're aware of them”
“Our choices are shaped entirely by genetics and environment”
“We experience making deliberate choices every day”
“Moral responsibility requires the ability to choose”
Overall Strength
How well-supported is this idea?
Quick Guide
Browse topics, read arguments from both sides, and share your own reasoning.
Encountering unfamiliar terms? Check the glossary -- we define everything in plain language. You'll also see dotted underlines on terms throughout the site -- hover to see what they mean.