From have + reason, partly after Middle French avoir raison.
Have-reason Sentence Examples
I have reason to believe that's about the only place that hasn't been infiltrated by those professing allegiance to East or West.
A lot of people from the Huston area have reason to know the Medena's – some even have reason to dislike them.
We have reason to believe that some organisms profit by experience and show that they do so by the modification of their behaviour in accordance with circumstances.
The atomic theory is a theory of the constitution of bodies which asserts that they are made up of atoms. The opposite theory is that of the homogeneity and continuity of bodies, and asserts, at least in the case of bodies having no apparent organization, such, for instance, as water, that as we can divide a drop of water into two parts which are each of them drops of water, so we have reason to believe that these smaller drops can be divided again, and the theory goes on to assert that there is nothing in the nature of things to hinder this process of division from being repeated over and over again, times without end.
In the latter case what we have are not "collations," for the art of collation was not understood till the 10th century, but selections or "excerpts" of readings which we have reason to fear are often imperfect and erroneous.