Social sciences like politics, history and economy are harder to replicate with the scientific method, however repeated observations, statiscial information as well as qualitative analysis with evidence-based research can still provide replicable analysis.
> If anyone has a better idea how to determine what is true and what isn't - i'd certainly be very interested
This kind of excuse is often cited to shut down any discussion, especially in history, politics and economics. I find it deeply anti-intellectual and dogmatic. As long as evidence and counter-evidence is followed, it should be possible to discuss alternative interpretations and solutions.