He appeared to be mildly retarded and described himself as an invalid unable to work.
A later work, "Invalid's Utensil," from 1930, flattens the divide between abstract modernist sculpture and everyday object even further.
The new findings do not render all of the previous, sometimes historical, work invalid.
We then identified irrelevant, missing, invalid, and inconsistent work history data to the extent feasible.
Toxicologists have continued for decades to ignore genetic variation when selecting animal models even though to do so leads to unreliable results [ 36] and using too few animals in the design of experiments can be as wasteful as using too many because the research becomes 'under-powered' and consequently invalid leading to unrepeatable work and avoidable repetition of research.
A state labor commissioner ruled her claim as manager to be invalid, as she had worked as an "unlicensed talent agent" under California's Talent Agencies Act.
"If you use unreal data... your work will be invalid and they will find it out," he warns.
The DOT appears to be invalid for assessing upper extremity work demands.
After testing four hypotheses in a large database of healthy workers, we concluded that the DOT is invalid for assessing upper extremity work demands, since none of the hypotheses could be rejected.
Patient characteristics available for the analysis were as follows: gender, age, patient is in a rest or nursing home for the elderly, has a guaranteed income, is entitled to increased reimbursement of health services, patient work status (pensioner, invalid and handicapped, unemployed, employee, self-employed), and patient is entitled to a lump sum for chronic illness.
