Earlier quoted context omitted.
> For a variety of reasons (legal, procedural, and political) MPs can't simply resolve to reject Brexit, There is no legal reason why ministers cannot reject Brexit; given the role of Parliament in the UK system of government, there is very little that ministers could be legally prevented from deciding, since the current (at whatever time it is you are asking the question) Parliament itself is generally the ultimate…
> There is no legal reason why ministers cannot reject Brexit; There is, for a revocation of article 50 notice to be legal, Parliament has to pass a motion directing the Government to do so[1]. [1] https://ukandeu.ac.uk/revoking-article-50-after-the-ecjs-rul...
We're talking here about what MPs can reject or not, and the fact that Parliament must direct the government before the government doing it is legal is not a legal barrier to MPs taking action on it (the form of which action would be an Act of Parliament directing the government.)