Historical research has the limitation of

Historical research is limited in universal generalisation because past events are unique and bound to their context.

Findings about one period cannot be safely projected as universal laws.

Problem identification is a normal early step, not a limitation.

Analytical synthesis is a strength of the historical method, weaving sources together.

Probable conclusions describe its cautious inference, not a defining weakness.

Sources may also be incomplete, biased or hard to authenticate.