নদী ও হ্রদে সাঁতার: বয়া, সুইমস্যাক, ভেস্ট: কোন সাঁতার সহায়কগুলি প্রকৃত সুরক্ষা দেয়?

Factual coreconfirmed by several independent voices

Insufficient core: not enough independent confirmations to retain a shared fact.

Disputedincompatible versions — to verify

No factual contradiction detected between sources.

Framing by sidesame fact, different words — loaded terms highlighted

No notable framing divergence.

Blind spotwhat one side keeps silent

No blind spot detected: every side covers the same facts.

Sources1 source cross-checked