Tawassuṭ bayna al-kamālayn (توسط بين الكمالين) is the middle ground between two extremes. The clauses are neither too dissimilar to be joined (complete disjunction) nor so equivalent that the second merely reinforces or explains the first (complete connection). They retain distinct functions yet share a suitable relation.
A key test is whether both are assertive (خبر) or both non-assertive (إنشاء), either in wording and purpose together or in their effective communicative purpose. A meaningful unifying link (الجامع) is also needed.
Two different yet related reports may thus be coordinated. If the second only restates the first in order to reinforce it, separation may better convey complete connection.