Demonstrative evidence is evidence in the form of a representation of an object.
From the en.wikipedia.org
Stage-door Janies have always been more demonstrative than stage-door Johnnies.
From the time.com
Tebow has no regrets about giving voice to or being demonstrative in his faith.
From the sacbee.com
The definite article has a more demonstrative feel than the English equivalent.
From the en.wikipedia.org
He had observed Marissa at school where, he says, she was much less demonstrative.
From the cnn.com
Greivis Vasquez is the group's demonstrative leader and top all-around talent.
From the washingtonpost.com
In his wily way, President Wahid knows full well the power of a demonstrative act.
From the economist.com
The citizens of Iowa and New Hampshire are not a particularly demonstrative bunch.
From the economist.com
This new demonstrative underlies the English determines this, these and those.
From the en.wikipedia.org
More examples
Demonstrative pronoun: a pronoun that points out an intended referent
Given to or marked by the open expression of emotion; "an affectionate and demonstrative family"
Serving to demonstrate
(demonstrativeness) tending to express your feelings freely
Demonstratives are deictic words (they depend on an external frame of reference) that indicate which entities a speaker refers to and distinguishes those entities from others. ...
This is a term used to refer to words like this/that, these/those and here/there which indicate a location relatively nearer to or further from the speaker (e.g. this book means 'the book relatively close to me', and that book means 'the book somewhat further away from me').
A pronoun or adjective which expresses proximity to or remoteness from the speaker (eg Spanish este, ese, aquel).