The source gives a monetary admission initially described as a loan, followed by «لا، ولكنَّه غَصْبٌ» — “No; rather it is property taken by usurpation.”
The amount and property may remain the same while the asserted legal basis changes from loan to wrongful taking. In a coherent statement, the denial can relate to the reason for liability rather than to the existence of the money itself.
The example shows why distinguishing the underlying asset from its legal cause is essential when applying lakin.