What's the difference between uncertain and unclear?

Uncertain


Definition:

  • (a.) Not certain; not having certain knowledge; not assured in mind; distrustful.
  • (a.) Irresolute; inconsonant; variable; untrustworthy; as, an uncertain person; an uncertain breeze.
  • (a.) Questionable; equivocal; indefinite; problematical.
  • (a.) Not sure; liable to fall or err; fallible.
  • (a.) To make uncertain.

Example Sentences:

  • (1) However, the mechanism of the inhibitory action is still somewhat uncertain.
  • (2) Of course the job is not done and we will continue to remain vigilant to all risks, particularly when the global economic situation is so uncertain,” the chancellor said in a statement.
  • (3) The functional significance of these early changes in the nodal region is uncertain.
  • (4) Preservation of dopaminergic and H1 neurotransmission, probably within the blood barrier, is needed to allow the neuroendocrine transduction of cholinergic inputs, whereas the role of 5-HT neurotransmission remains uncertain.
  • (5) The nature of these infiltrative foci remains uncertain; however, they are unlikely to have been of neoplastic origin and may be due to interleukin-2-induced lymphocytic infiltration.
  • (6) Whether or not any alteration in disease progression will accrue from demonstrated local downstaging is, of course, uncertain.
  • (7) Similarly, it appears that acute hydronephrosis or worsening of an existing hydronephrosis has been somewhat overlooked as a possible cause of uncertain abdominal pain during pregnancy.
  • (8) In 11 patients, the electrophysiological mechanism remained uncertain.
  • (9) The nature of the cystatin C-immunoreactive substance in some of these vascular lesions is uncertain, but it might conceivably play an additional important role in the pathogenesis of brain hemorrhage in these cases.
  • (10) The mechanism of action is still uncertain but it is believed by some workers to be similar to that of a beta-adrenergic stimulator.
  • (11) Assays of drug levels in blood and of other biochemical characteristics of psychiatric patients are being proposed for clinical application, although their utility in practice remains uncertain.
  • (12) In 26 patients, including the two reported here, etiology was uncertain (idiopathic aneurysm of the left ventricle) in as much as malformation or an infectious disease might have been the underlying cause.
  • (13) Instead of inevitable defeat there is uncertain cop-out.
  • (14) The aetiology remains at present uncertain and therefore rational therapeutic strategies are difficult to plan.
  • (15) It was concluded that (1) there is a group of patients whose histories of poliomyelitis are uncertain, and (2) the lack of clear evidence for previous denervation after extensive electrodiagnostic testing is a valid means for excluding the diagnosis of postpoliomyelitis syndrome.
  • (16) Although approximately 24,000 adolescents were questioned, the investigations together provide an uncertain picture of the habits as these are not representative for Danish adolescents.
  • (17) McCall said the outlook remained uncertain: “The economic and operating environment remains uncertain, following the high levels of disruption and more recently the UK’s referendum decision to leave the EU, as well as the recent events in Turkey and Nice, which have affected consumer confidence.
  • (18) The significance of this event is uncertain; cleaved NGF demonstrates bioactivity and no function has been attributed to the octapeptide produced (NGF-OP; Ser-Ser-Thr-His-Pro-Val-Phe-His).
  • (19) While the histogenesis of these tumors remain uncertain, it is necessary to recognize that these aggressive neoplasms may occur primarily in the skin.
  • (20) Estimates of the number of eventual TA-AIDS cases to be seen are considerably more uncertain and require additional assumptions about the incubation distribution.

Unclear


Definition:

Example Sentences:

  • (1) ), nosological frontiers are still unclear and accordingly justify a comparative serological study of M.M., W.M., and B.M.G.
  • (2) However, the effects of such large-scale calvarial repositioning on subsequent brain mass growth trajectories and compensatory cranio-facial growth changes is unclear.
  • (3) Thus it is unclear how a language learner determines whether German even has a regular plural, and if so what form it takes.
  • (4) It is unclear if the changes in high-energy phosphates during endotoxin shock cause irreversibility.
  • (5) It’s unclear too whether Google will continue to pay Mozilla to be the default browser in countries outside the US, Russia and China when the current deal ends in December.
  • (6) Factors contributing to a more aggressive form of carcinoma are unclear and require further study.
  • (7) Two people were injured and taken to hospital, but it is still unclear who was responsible.
  • (8) The benefit of routine preoperative CT in patients with otherwise resectable colonic or rectal cancer remains unclear.
  • (9) Whether we are dealing with true Osborn waves is unclear.
  • (10) Many governments try to protect their tax base through national blacklists based on criteria that are often unclear and inconsistently applied.
  • (11) Although the mechanism(s) of Vb depolarization in OMCD is unclear at the moment, this depolarization suggests that OMCD is responsive to peritubular pH alterations.
  • (12) Poor prognostic factors included associated chondromalacia and an unclear preoperative diagnosis.
  • (13) Because the mechanism whereby Shigella dysenteriae I enterotoxin induces intestinal secretion is unclear, the effect of this toxin on adenylate cyclase activity in rabbit ileal mucosa was studied under various in vitro and in vivo conditions.
  • (14) The factors predisposing to and complicating acute renal failure (ARF) in the medical intensive care unit (ICU), and their relative influence on outcome during ARF are unclear.
  • (15) Preliminary studies using amino acid and ion inhibition studies suggested that transporter I was a system ASC-type carrier, transporter III a system L carrier, while the nature of transporter II was unclear.
  • (16) However the mechanisms responsible for these phenomena are unclear.
  • (17) Hyperferritinemia, an unclear mechanism, is frequently observed in chronic alcoholics.
  • (18) Previously, we found resting metabolic rate increased at high altitude but the mechanism and consequences of this increase were unclear.
  • (19) The mechanism behind this increased thyroid volume is unclear, as most patients had normal serum thyrotropin levels and no thyroid autoimmunity.
  • (20) These data notwithstanding, the role of SIV genetic variation in the pathogenesis of AIDS in monkeys remains unclear.