The phrase "additionally unclear" is correct and usable in written English.
It can be used when you want to indicate that something is not only unclear but also has further ambiguity or confusion.
Example: "The instructions provided were additionally unclear, leaving the team unsure of how to proceed."
Alternatives: "further ambiguous" or "also confusing".
It was additionally unclear how increasing the number of US soldiers available to train Iraqi fighters would overcome a central problem to the training effort most recently spelled out on Monday by Obama: a lack of recruits to train.
Sources said it was additionally unclear what role the UK would have in shaping the priorities of Horizon Europe after Brexit, given it would no longer be a member state and would not be an EFTA member, acceding country, candidate country or potential candidate country.
Additionally, unclear item definition identified by panellists, such as differentiating between the practices of mindfulness versus mindfulness meditation, require further clarification.
As a result of this complexity, the mechanisms behind CIL are largely unknown, and it is additionally unclear how these various behaviors during the process are integrated to induce a seamless response.
Additionally, in unclear or equivocal imaging findings of lymph nodes a re-report was performed with a higher sensitivity at the expense of specificity to minimise geographical miss in the contouring procedure for radiation treatment and to maximise the binary decisions for each lymph node (malignant vs. benign).
Additionally, what remains unclear is how C55-PP generated de novo in the cytoplasm by the pathway terminating at UppS is dephosphorylated in its final necessary stage for subsequent use as a lipid carrier.
Additionally, it's unclear whether current U.S. bandwidth could actually handle everyone moving to the cloud.
Additionally, it is unclear if differences between exercise intensities were controlled for [7].
Additionally, it is unclear whether NICAM-LETKF will work stably when real observations are used.
Additionally, it is unclear what in the "Nature and Reason of Things" is necessary.
Additionally, it is unclear whether the requirement violated would be "normative" in the sense that one ought not to violate it.
