This ASSEDEL commentary offers a doctrinal critique of three separate opinions delivered in the Grand Chamber judgment Yasak v. Türkiye (no. 17389/20, 5 May 2026), which found violations of Articles 3 and 7 ECHR and reversed the Chamber’s judgment. The case concerned the conviction of Şaban Yasak for membership of an alleged armed terrorist organization (FETÖ/PDY) based on evidential links to the Gülen movement, and his subsequent detention conditions.
The commentary examines the reasoning of the dissenting opinions against established case-law. On Article 3, the commentary argues that the Joint Partly Dissenting Opinion on detention conditions employs a disaggregated rather than genuinely cumulative assessment, adopts an administrative-capacity perspective rather than the standpoint of the detained person, misapplies the CPT minimum standard of outdoor exercise as a sufficiency benchmark, and accords excessive weight to the applicant’s voluntary election to remain in the facility and to domestic compliance with Muršić principles.
On Article 7, the commentary contests the Joint Dissenting Opinion’s thesis that deficiencies in establishing the constituent mental element of a specific-intent offence belong to Article 6 procedural fairness rather than Article 7 legality, demonstrating that nullum crimen sine lege requires an individualized establishment of the mens rea that the offence structurally requires.
The commentary further addresses Judge Ní Raifeartaigh’s individual dissent, clarifying the jurisprudential basis for recognizing mens rea as an autonomous Article 7 requirement and distinguishing the legality review the Court conducts from the evidentiary reweighing the fourth-instance doctrine forbids. The central doctrinal concern across all three opinions is the substitution of formal compliance with domestic criteria for the substantive assessment the Convention’s case-law requires.
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