It's an observation that fits our theoretical models when dark matter is assumed.
It's indirect proof. The indirect proof is so overwhelming strong that any rational person will concluded with reasonable certainty that dark matter is real.
Directly detecting a dark matter particle will give us more data than "dark matter is real".
It's indirect proof. The indirect proof is so overwhelming strong that any rational person will concluded with reasonable certainty that dark matter is real.
Directly detecting a dark matter particle will give us more data than "dark matter is real".