Pakistan joined SCO
Source
Pakistan MOFA / SCO — no link on the sheet. Needs final source-line audit.
What it proves
SCO membership broadens Pakistan's Eurasian multilateral engagement.
How to deploy: Use Pakistan joined SCO (Full member 9 Jun 2017; observer since 2005) to support: SCO membership broadens Pakistan's Eurasian multilateral engagement.
What it does not prove: Full membership from 9 June 2017 is a seat at a consensus-based forum, not leverage inside it, and the date alone shows nothing about what Pakistan has extracted from membership in trade, connectivity or security terms. The twelve-year wait from observer status in 2005 is itself the point: accession was slow and negotiated, so membership marks the beginning of a bargaining process rather than its result.
Memory hook: Observer 2005 → member 2017: twelve years bought a seat, not a settlement
Rebuts the claim: "Pakistan's Eurasian turn is a recent improvisation after US disengagement" — the SCO track ran from observer status in 2005 to full membership in 2017, long predating it.