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as a dog returns to his vomit, so a fool repeats his folly

Foolish people are apt to repeat their missteps. A: "I can't believe Sarah is going skiing again, after she broke her leg the last time." B: "Well, as a dog returns to his vomit, so a fool repeats his folly.
See also: dog, folly, fool, repeat, return

History repeats itself.

Prov. The same kinds of events seem to happen over and over. It seems that history is about to repeat itself for that poor country; it is about to be invaded again. Alan: The country is headed for an economic depression. Jane: How do you know? Alan: History repeats itself. The conditions now are just like the conditions before the last major depression.
See also: history, itself, repeat

repeat oneself

Express oneself in the same way or with the same words, as in Grandma forgets she has told us this story before and repeats herself over and over, or This architect tends to repeat himself-all his houses look alike. A well-known version of this idiom is the proverb History repeats itself, first recorded (in English) in 1561. For example, Her mother also married when she was 18-history repeats itself. [Mid-1800s]
See also: repeat
References in periodicals archive ?
This determination of mutual performance expectations should be made by individuals who have a clear understanding of all of the costs of measurement disputes caused by poor accuracy and repeatability.
The repeatability of a robot was defined to be three times the standard deviation of the random component of the radial error.
The above is but an overview of some, certainly not all, of the areas associated with the compounding of elastomeric compounds which can in some way have an influence on the overall quality and repeatability of compounds mixed in an intensive mixer.
The differences concern the effect of each paste's rheology on its aperture release characteristics, which impacts deposited volume repeatability.
a real-time, built-in repeatability tester that confirms cutter accuracy;
manufacturing facilities, offer industry leading repeatability and low levels of insertion loss.
Reputable suppliers publish specifications which allow the user to calculate and predict the impact of these and other real-world effects on installed flow accuracy and repeatability.
The new ACE 400WB also incorporates key elements of Azimuth's patented testing approach that provides unmatched repeatability, flexibility and automation for wireless IP device testing.
APV valves are self-cleaning and designed to eliminate dead spots and to improve shot-to-shot repeatability.
Take surface mount assembly: as packages such as 0201 passives and CSPs enter mainstream production, assembly processes must deliver that repeatability with significantly higher accuracy.
Given the size and volume of parts, repeatability and scrap reduction are critical factors for cost effective production.
Why you should care: Wasino says the built-in active thermal feedback monitoring system maintains stable temperatures in the main spindle and motor, the x-axis ballscrew and the coolant system, which leads to greater accuracy and repeatability.
NYSE: IMN) announced that the Imation Matchprint Inkjet System will be available as an upgrade for the Canon BJC-8500 printer beginning in June, enabling graphic design and prepress users to dramatically improve their output accuracy and repeatability for fast, economic inkjet concept proofs.
HyperGrid technology results in interconnect solutions that offer the same tiny form factor, high node count and stackability features required in many micro-miniature applications, without the electrical, repeatability or cost limitations associated with other technologies such as pogo pins, fuzz buttons, and conductive elastomers.