I would grade the provided answer a 2.0 out of 10.0. The reasons for this grade are as follows:

1. **Source Place:**
   - Opposite Concept: Sink Place (where tokens are consumed or end up). 
   - More General Concept: Place (a node in the Petri net where tokens reside).
   - Explanation: The provided answer replaces "Source Place" with "Target Position" without clear relevance to Petri nets, and it also misunderstands the fundamental idea of source and sink in Petri nets.

2. **Immediate Transition:**
   - Opposite Concept: Timed Transition (transitions that include delays or are scheduled).
   - More General Concept: Transition (an event that causes a change in state within a Petri net).
   - Explanation: The provided alternative muddles the concept of transitions by inadequately expressing how immediate transitions operate as opposed to timed or delayed transitions.

3. **Live Transition:**
   - Opposite Concept: Dead Transition (a transition that can never occur).
   - More General Concept: Transition (an entity that can occur under certain conditions in the net).
   - Explanation: The provided answer describes concepts unrelated to the liveness of transitions, missing the point of a transition being perpetually enableable or not.

4. **Bounded Net:**
   - Opposite Concept: Unbounded Net (a net where the number of tokens in some places can grow indefinitely).
   - More General Concept: Net/System (a structure consisting of places, transitions, and arcs).
   - Explanation: The description in the provided answer does not address the notion of unbounded versus bounded behavior in Petri nets. It misinterprets the concept of states or nodes in a bounded context.

5. **Free Choice Net:**
   - Opposite Concept: Non-Free Choice Net (a net where choices are restricted or pre-determined by the system's structure).
   - More General Concept: Petri Net (the overarching system or model used to describe processes).
   - Explanation: The provided explanation confuses the structural implications of free choice in nets, incorrectly framing it as a general decision-making process unconstrained by system rules.

The overall content indicates a fundamental misunderstanding of Petri net terminology and concepts. It fails to accurately propose opposite or more general concepts for the specified terms, hence the low grading.