"it can be conjectured" is correct and usable in written English.
You can use it when you are making a provable but unconfirmed guess about something. For example, "it can be conjectured that the cause of the outage was a power surge."
But, to quote him once more, "enemies and intriguers" turned the all-powerful prime minister, Ibn al-Khaṭīb, against him and raised suspicions regarding his loyalty; it can be conjectured that the task of these enemies must have been greatly facilitated by the apparent jealousy between the two most brilliant Arab intellectuals of the age.
It can be conjectured that the interactivity of their learning process supported the development of these baseline skills.
Hence, it can be conjectured that the quality of 3D video from the viewers' point of view is largely determined by the binocular disparity.
Furthermore, it can be conjectured that the largest disparities per frame and per scene affect the viewer comfort level the most.
Although tear film immunoglobulin levels in patients with CVID have not been studied, it can be conjectured that tear film immunoglobulins are also decreased.
It can be conjectured that the graphene deposited onto Si (n-type) in G/Si cells in the present study acts like an n-type layer.
In this case, however, the railway is not pursued as such, but merely as the proprietor of certain land alongside its track, and no reason can be conjectured why an obnoxious form of weed growing upon its land, should be more detrimental than the same weed growing upon adjoining lands.
Considerably less can be conjectured about the history M. s. pallidus; it probably survived the major glaciations in refugia located somewhere on the southern coast of the Caspian Sea, the eastern part of the Caucasian refugium.
The enhanced efficiency of devices with pristine SWCNTs can be conjectured to better opto-electrical properties, enhanced transition, improved local structure and the undamaged tubes.
However, dynamics along these lines can be conjectured to be associated with non-integer values of m arising from generic convex and/or concave interfaces as depicted in Fig. 1(c) [4].
