Questions & Answers about Il semble que Paul soit prêt.
Soit is the present subjunctive form of être.
After il semble que, French often uses the subjunctive because the speaker is presenting something as an impression, appearance, or possibility rather than a confirmed fact. So Il semble que Paul soit prêt suggests Paul appears to be ready, not Paul is definitely ready.
For a learner, soit is the safest and most standard choice here.
It does not refer to Paul or to anything specific.
This is an impersonal il, like English it in:
- It seems that...
- It is raining
- It is important that...