First of all, curiosity which involves a willingness to know answers. So Aziz is curious about this and he want to seek answers about handwriting analysis.
Then Skepticism, this will help Aziz to evaluate the results or answers he get from the analysis.
And Humility, this will help Aziz be attentive to any potential biases that comes in the way of his interpretation of the data and then Aziz rely on the evidence he gathered from the interpretation of data.
