Tacit Substitution Inherent in Institution of Heirs

Notes

1. §28.5.25.prinesse uidetur institutioni — The verb uidetur ('is deemed', 'seems') takes a nominative with infinitive construction, agreeing with the subject tacita substitutio. The infinitive inesse (from insum, 'to be in', 'to be inherent') governs the dative, here institutioni ('in the institution [of an heir]').
2. §28.5.25.prtacita substitutio — In Roman law, 'substitution' (substitutio) is the designation of an alternative heir in case the primary heir cannot or does not take the inheritance. Here, it refers to the interpretation that the designation in the preceding fragment (24.pr) ('both or whichever is alive') implicitly contains a 'tacit substitution' where the survivor automatically takes the other's share.