What's the difference between certain and doubtless?

Certain


Definition:

  • (a.) Assured in mind; having no doubts; free from suspicions concerning.
  • (a.) Determined; resolved; -- used with an infinitive.
  • (a.) Not to be doubted or denied; established as a fact.
  • (a.) Actually existing; sure to happen; inevitable.
  • (a.) Unfailing; infallible.
  • (a.) Fixed or stated; regular; determinate.
  • (a.) Not specifically named; indeterminate; indefinite; one or some; -- sometimes used independenty as a noun, and meaning certain persons.
  • (n.) Certainty.
  • (n.) A certain number or quantity.
  • (adv.) Certainly.

Example Sentences:

  • (1) One hour after direct mechanical cardiomassage (DMCM) a moderately pronounced edema of the intercellular spaces in the basal compartment of the seminiferous epithelium, normal content of lactate and succinate dehydrogenases, and a certain decrease in the activity of glucose-6-phosphate dehydrogenases and NAD- and NADP-diaphorases were noted.
  • (2) Work on humoral responses has focused on lysozyme, the hemagglutinins (especially in the oyster), and the clearance of certain antigens.
  • (3) Stress is laid on certain principles of diagnostic research in the event of extra-suprarenal pheochromocytomas.
  • (4) As a group, the three mammalian proteins resemble bovine serum conglutinin and behave as lectins with rather broad sugar specificities directed at certain non-reducing terminal N-acetylglucosamine, mannose, glucose and fucose residues, but with subtle differences in fine specificities.
  • (5) A segment of vas deferens was transplanted to the contralateral deferens with the intention of improving treatment for certain cases of infertility caused by obstruction.
  • (6) hypoglossal nucleus), whereas in other areas the angiotensinogen gene was expressed only in a certain population of glial cells.
  • (7) The following conclusions emerge: (i) when the 3' or the 3' penultimate base of the oligonucleotide mismatched an allele, no amplification product could be detected; (ii) when the mismatches were 3 and 4 bases from the 3' end of the primer, differential amplification was still observed, but only at certain concentrations of magnesium chloride; (iii) the mismatched allele can be detected in the presence of a 40-fold excess of the matched allele; (iv) primers as short as 13 nucleotides were effective; and (v) the specificity of the amplification could be overwhelmed by greatly increasing the concentration of target DNA.
  • (8) Certainly, Saunders did not land a single blow that threatened to stop his opponent, although he took quite a few himself that threatened his titles in the final few rounds.
  • (9) We present a mathematical model that is suitable to reconcile this apparent contradiction in the interpretation of the epidemiological data: the observed parallel time series for the spread of AIDS in groups with different risk of infection can be realized by computer simulation, if one assumes that the outbreak of full-blown AIDS only occurs if HIV and a certain infectious coagent (cofactor) CO are present.
  • (10) HDAra-C in combination with anthracyclines is now considered to be a treatment which may afford some hope of a cure in a certain percentage of cases of adult acute non-lymphocytic leukemia.
  • (11) These results suggest that a certain minimum level of expression of c-myc is required for the maintenance of ras transformation in NIH 3T3 cells.
  • (12) This "paradox of redistribution" was certainly observable in Britain, where Welfare retained its status as one of the 20th century's most exalted creations, even while those claiming benefits were treated with ever greater contempt.
  • (13) In certain cases, the effects of these substances are enhanced, in others, they are inhibited by compounds that were isolated from natural sources or prepared by chemical synthesis.
  • (14) Accumulating evidence indicates that for most tumors, the switch to the angiogenic phenotype depends upon the outcome of a balance between angiogenic stimulators and angiogenic inhibitors, both of which may be produced by tumor cells and perhaps by certain host cells.
  • (15) The findings indicate that these spaces were lined by a lipid monolayer which formed bilayered lamellae under certain conditions.
  • (16) Positive feedback effects on serum gonadotrophins in castrates were observed following injection of certain doses of some steroids.
  • (17) Hence, presence of IgG rheumatoid factor correlated positively with the presence of rheumatoid disease, and evidence was established that certain features of rheumatoid inflammation occur in dental periapical lesions of many patients with rheumatoid disease.
  • (18) The typology developed in two previous surveys of illicit heroin products is applicable to many of the samples studied in this work, although significant changes have occurred in the chemical profile of illicit heroin products from certain geographical regions.
  • (19) The presence of an inverse correlation between certain tryptophan metabolites, shown previously to be bladder carcinogens, and the N-nitrosamine content, especially after loading, was interpreted in view of the possible conversion of some tryptophan metabolites into N-nitrosamines either under endovesical conditions or during the execution of the colorimetric determination of these compounds.
  • (20) An electrogenic sodium-potassium pump appears to contribute materially to the steady-state potential and to certain of the transient potential responses of vascular smooth muscle.

Doubtless


Definition:

  • (a.) Free from fear or suspicion.
  • (adv.) Undoubtedly; without doubt.

Example Sentences:

  • (1) If Charles Spencer, 3rd Duke of Marlborough, who bought the island in 1738, were to return today he would doubtless recognise the scene, though he might be surprised that his small private buildings have grown into a sizable hotel.
  • (2) Doubtless the regulators will make their discomfort clear to government," he added.
  • (3) He avoided everyone he didn't want to see when he was in Hong Kong, the first place he escaped to, and for several weeks he remained beyond the reach of the world's media, and doubtless a small army of spies, while holed up in a hotel room in the transit area of Moscow's Sheremetyevo airport.
  • (4) The latter is more soundly based in law than the former and doubtless at some point that will play out in the courts.
  • (5) The job he will do there, as head of the emergency disaster relief agency the International Rescue Committee, is a major one, to which he will doubtless bring all his abilities.
  • (6) Russia's new-found readiness to consider the "far tougher" sanctions demanded by Gordon Brown at the UN this week is doubtless linked to this confirmation of Iranian bad faith.
  • (7) The GDLs are strictly sex-linked; that is, normally they do not recombine during spermatogenesis, so that considerable divergence in DNA sequence doubtless has occurred between the locus on the X and the locus on the Y.
  • (8) We shall continue our measurements, particularly those of activity in persons, and doubtless we shall refine our estimates of collective dose, but they are unlikely to change significantly.
  • (9) But in 2014, while the presence of probably the greatest player of the 20th century was undoubtedly a unique selling point for the conference, the life of the game in the US has reached a point where the constituency of writers, artists, academics, and students in attendance would doubtless have assembled anyway, as the game gains an increasing foothold in the country.
  • (10) Evans has disgraced the notion of footballers as role models for the young but sadly he wasn’t the first and doubtless won’t be the last.
  • (11) In Islington, Notting Hill, and the more upmarket corners of the home counties, austerity will doubtless be taken in a lot of people's stride: if you have opted out of large swaths of the public sector and earn a six-figure salary, the prospect of the cuts will inevitably cause you relatively little worry.
  • (12) Doubtless, the police officer was telling the truth.
  • (13) Ranieri's dismissal doubtless came as a relief to him, ending a charade that saw him summoned to two meetings with Chelsea's chief executive Peter Kenyon over the past week at which he was asked to discuss his future plans for the club.
  • (14) suis negative SPF primary piglets for the purpose of doubtless diagnosis of eperythrozoonosis (EEZ) of swine.
  • (15) Doubtless Snowden caused reflection and perhaps some change of strategy.
  • (16) Photograph: Dan Medhurst Like my group, the Germans and Norwegians were doubtless attracted not just by the promise of incredible snow and the sense of adventure, but also by the price.
  • (17) Doubtless others may debate that but it would be hard to disagree with the Liverpool manager when he declared that his team would have warranted at least a point from this performance.
  • (18) Among Oborne's most telling passages was this one: "Doubtless both David Cameron and George Osborne think of themselves, quite genuinely, as middle class.
  • (19) He has offered a lineup of a dozen parties that supported his bid to be president – and will doubtless by expecting to be rewarded when Essebsi’s party forms a coalition government in the new year.
  • (20) After more than one decennium of international research work the doubtless identification of the causative agents of the non A-non B-hepatitis (NANBH) has not yet been successful.