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Longman Dictionary of Contemporary English
▪ Here is an example of a logical deduction.
▪ And finally the detective must uncover the murderer by logical deduction from facts fairly put before the reader.
▪ An argument can be a perfectly logical deduction even if it involves a premise that is in fact false.
▪ Here the logical principle is deduction.
▪ But today more than 70 % of taxpayers already use the simple one-page standard deduction.
▪ The mortgage interest deduction, for example, subsidizes home ownership, as does the deduction for property taxes.
▪ The mortgage interest deduction promotes home ownership.
▪ Forbes would eliminate all loopholes, including the popular mortgage interest deduction aimed at encouraging home ownership.
▪ Still, concern about home-buying is why Alexander charges that eliminating the mortgage interest deduction would cause a real-estate crash.
▪ If the corporation borrows the money, all these interest deductions can be claimed by it.
▪ Gramm and others argue that the mortgage interest deduction is too popular with middle-class families to discard.
▪ Some hotels use accounting machines which can produce the payroll, tax deduction records and payslips simultaneously.
▪ The Senate bill would raise the tax deduction for health insurance bought by the self-employed.
▪ President Bill Clinton vetoed that, and proposed instead some small tax credits and tax deductions for higher education.
▪ The lessor benefits by obtaining tax deductions that would otherwise be unavailable.
▪ The Inland Revenue originally wanted the machinery ring to be responsible for tax deductions for such workers.
▪ Currently individuals can take a tax deduction of 20 to 40 percent for charitable donations.
▪ Now those who can prove conclusively that they are self-employed will be responsible for their own tax deductions and claims.
▪ Hefty tax deductions went to large families.
▪ Unlike the income tax, however, Social Security taxes allow no deductions for spouses or other dependents.
▪ Our tax system has shifted relentlessly toward taxes that allow no deductions for family dependents.
▪ No, because corporations can not claim a deduction for dividend distributions.
▪ Several of those clients said they knew nothing about IRAs or the claimed deductions.
▪ Still, concern about home-buying is why Alexander charges that eliminating the mortgage interest deduction would cause a real-estate crash.
▪ In return for simplicity, it would eliminate popular deductions for charitable contributions, state and local taxes and home-mortgage interest.
▪ Some proposals, including Forbes', would eliminate all tax deductions.
▪ A company which refused to make attachment of earnings deductions against one poll tax offender, was fined £200 by magistrates.
▪ The other half is making the deduction worth something.
▪ A weekly tariff income is used to make deductions from income support for capital between these two sums.
▪ Nowadays I am accustomed to making deductions from a single piece of clothing or personal item associated with a crime.
▪ In such circumstances, the courts will usually make a deduction because you are receiving early payment.
▪ It is nevertheless possible to make deductions about stages of language before historical records.
▪ Holmes had made a deduction regarding Watson himself.
▪ Meta-deduction depends on two components: an ability to make deductions, and an ability to construct reasoning strategies.
▪ The game teaches children logic and deduction.
▪ And if the Clinton administration does succeed in withdrawing the tax deduction?
▪ And now, thanks to a very neat bit of deduction, you know.
▪ But, of these, 82. 5 percent of taxpayers with incomes higher than $ 200, 000 take the deduction.
▪ Credit notes can be exchanged before they mature but this does involve the deduction of a premium.
▪ Does it have an offsetting deduction?
▪ It is subject to tax, superannuation and national insurance deductions - unlike State Sickness Benefit.
▪ Still, concern about home-buying is why Alexander charges that eliminating the mortgage interest deduction would cause a real-estate crash.
▪ The amount of income left over after deduction of this taxation is known as disposable income.
The Collaborative International Dictionary

Deduction \De*duc"tion\, n. [L. deductio: cf. F. d['e]duction.]

  1. Act or process of deducing or inferring.

    The deduction of one language from another.

    This process, by which from two statements we deduce a third, is called deduction.
    --J. R. Seely.

  2. Act of deducting or taking away; subtraction; as, the deduction of the subtrahend from the minuend.

  3. That which is deduced or drawn from premises by a process of reasoning; an inference; a conclusion.

    Make fair deductions; see to what they mount.

  4. That which is or may be deducted; the part taken away; abatement; as, a deduction from the yearly rent in compensation for services; deductions from income in calculating income taxes.

    Syn: See Induction.

Douglas Harper's Etymology Dictionary

early 15c., "action of deducting," from Middle French déduction or directly from Latin deductionem (nominative deductio), noun of action from past participle stem of deducere (see deduce). Meaning "that which is deducted" is from 1540s. As a term in logic, from Late Latin use of deductio as a loan-translation of Greek apagoge.


n. 1 That which is deducted; that which is subtracted or removed 2 A sum that can be removed from tax calculations; something that is write off 3 (context logic English) A process of reasoning that moves from the general to the specific, in which a conclusion follows necessarily from the premises presented, so that the conclusion cannot be false if the premises are true. 4 A conclusion; that which is deduced, concluded or figured out 5 The ability or skill to deduce or figure out; the power of reason

  1. n. a reduction in the gross amount on which a tax is calculated; reduces taxes by the percentage fixed for the taxpayer's income bracket [syn: tax write-off, tax deduction]

  2. an amount or percentage deducted [syn: discount]

  3. something that is inferred (deduced or entailed or implied); "his resignation had political implications" [syn: entailment, implication]

  4. reasoning from the general to the particular (or from cause to effect) [syn: deductive reasoning, synthesis]

  5. the act of subtracting (removing a part from the whole); "he complained about the subtraction of money from their paychecks" [syn: subtraction] [ant: addition]

  6. the act of reducing the selling price of merchandise [syn: discount, price reduction]


Deduction may refer to:

  • English modals of deduction, English modal verbs to state how sure somebody is about something.
  • Deduction (food stamps), (in the USA) used to calculate a household’s monthly food stamp benefit goods

Usage examples of "deduction".

He knew the mathematical formulas the service used to target institutions for auditing and every year carefully made out his returns, underreporting legitimate deductions and not taking others so that no red flags triggered the random-audit process.

Just as an axiomatic destabilizes any terms and definitions prior to the relations of logical deduction, so too capital sweeps clear the fixed barriers of precapitalist society-and even the boundaries of the nation-state tend to fade into the background as capital realizes itself in the world market.

In taxing the income of a nonresident, there is no denial of equal protection in limiting the deduction of losses to those sustained within the State, although residents are permitted to deduct all losses, wherever incurred.

The bill concerning the territories and revenues of the diocesses, or the established church bill, recited those parts of the reports of the commissioners which set forth the proposed alterations among the sees, and deductions from their revenues.

A deduction from her selary would be necessary, in case she should retire from the sphere of her dooties for a season.

Frederick had his good and his bad qualities, like all great men, but when every deduction on the score of his failings has been made, he still remains the noblest figure in the eighteenth century.

I am constantly tempted to shirk the details, and to let hints stand for actual facts and ineluctable deductions.

Following Ebbinghaus and some of the deductions from diseases of memory, it seemed as if one could align memory along a temporal dimension, in which, in the periods of seconds to minutes to hours following some new experience, processes of perceptual filtering introduced items into a labile, transient short-term memory and from there into a permanent long-term memory.

What was also becoming clear, by deduction and some hasty new experiments, was that banishment of leukocytes opened up a weakness, a vulnerability.

A remarkable activity of mind was observable in the theological world, and men of great learning and keen intellect began to apply the deductions of foreign naturalism to the sacred oracles.

Keenly intent upon his new conclusions, uninformed of the fact that Clifford Sulgate had been overheard and murdered by Bronden, The Shadow had carried his previous deductions farther and farther from the proper course.

An agreement was struck between them whereby Ikey would put up the capital for the brothel for which he would receive seventy percent and Mary thirty percent after the deduction of running expenses.

I got no farther than the curious conclusion that all the Millerites were grown up people without children, and, by a natural deduction, that my mother and sisters and myself were safe from the end of the world.

Unless he had the checkbook with him and was still writing checks, the overdrafts most likely had come from some of those automatic deductions.

The product of the assay is examined, and a deduction of a considerable percentage is very properly made for impurities, since the assay really determines the percentage, not merely of tin, but of the bodies present which are reducible at a white heat.