Full Idea
Scotus said the will is a power for opposites, in the sense that even when actually willing one thing, it retains a real, active power to will the opposite. He detaches the idea of freedom from time and variability.
Gist of Idea
The will retains its power for opposites, even when it is acting
Source
report of John Duns Scotus (works [1301]) by Stephen D. Dumont - Duns Scotus p.206
Book Reference
'Shorter Routledge Encyclopaedia of Philosophy', ed/tr. Craig,Edward [Routledge 2005], p.206
A Reaction
In the sense that we can abandon an action when in the middle of it, this seems to be correct. Not just 'I could have done otherwise', but 'I don't have to be doing this'. This shows that the will has wide power, but not that it is 'free'.