The phrase "argument is not clear" is correct and usable in written English.
You can use it when you want to express that the reasoning or explanation provided in a discussion or text lacks clarity or is difficult to understand.
Example: "After reviewing the proposal, I must say that the argument is not clear, and I need further clarification on the main points."
Alternatives: "the reasoning is unclear" or "the explanation lacks clarity."
Thank you for pointing out that our argument was not clear in the initial manuscript.
But this argument isn't clear-cut.
We should not deny them their right …" Midwife 6, age 60+ These midwives and some obstetricians also acknowledged the rights of the foetus but the arguments were not clear-cut and highlight the uncertainties and complexities that confront health providers in abortion care provision.
For much of the time, Brecht is a bludgeoner and toter of patronising parables; his few words are too many: he keeps spelling things out but his arguments aren't clear.
While Averroes' argument from natural science may succeed against some versions of the skeptical argument, it is not clear that it succeeds against its immediate target, al-Ghazālī's skeptical argument.
Yet, without further argument, it is not clear why one should accept this view; it seems almost certain that those suffering from serious illness that might be addressed by future research will not accept it.
With regard to Gavrilov and Gavrilova's argument, it is not clear biologically what sort of redundancy exists in systems that protect against mortality.
It is unclear why the rps5 mutants promote leaking scanning for the GCN4 reporter, since the phenotype is that these mutations confer a hyperaccurate initiation phenotype one would assume that a start codon in a good sequence context would be as good as WT initiation or better (the structural argument provided is not clear nor satisfying as written).
In light of the foregoing arguments, it is not clear how these proteins function at high temperatures, but it is possible that they do not engage in weak binding by short motifs but undergo induced folding of extended regions resulting in much stronger binding, as observed in the assembly of translation initiation [62] or the ribosome [63].
His argument is not exactly clear, but the problem appears to be semantic: he cannot find an interpretation of the phrase 'itself to be true [se esse veram]' in the supplementary condition that will permit it to function as a general principle.
