If a theory is externally inconsistent, we have reason to believe that it isGroup of answer choicesFalseTrueInternally inconsistentInternally consistent

Analyzing the Question

To determine the implication of a theory being externally inconsistent, we need to understand the definitions of externally and internally consistent theories.

1. Definitions:
   • Externally Inconsistent: A theory is considered externally inconsistent if it conflicts with observable evidence or established theories.
   • Internally Consistent: A theory is internally consistent if its propositions do not contradict each other.
   • Internally Inconsistent: This refers to a theory that contains contradictions within its own framework.

Evaluating the Options

• False: This option does not directly reflect the implications of external inconsistency.
• True: This implies that the theory has been disproven or lacks validity if it is externally inconsistent.
• Internally inconsistent: This suggests a contradiction within the theory itself, but it doesn’t directly connect to external inconsistency.
• Internally consistent: This would imply that within its own framework, the theory holds up, which is not relevant to the discussion of external consistency.

Conclusion

If a theory is externally inconsistent, it undermines its credibility in light of evidence or other established theories, leading us to believe that it is likely False or invalid in terms of its applicability or correctness.

Final Answer

False