Specific language impairment (SLI) is diagnosed when a child's language does not develop normally and the difficulties cannot be accounted for by generally slow development, physical abnormality of the speech apparatus, autism spectrum disorder, acquired brain damage or hearing loss.
Perfect competition. A perfectly competitive market is a hypothetical market where competition is at its greatest possible level. Neo-classical economists argued that perfect competition would produce the best possible outcomes for consumers, and society.
A true global market is an integrated market for global trade where buyers and sellers 'meet' from all over the globe to trade with little barriers to trading. Of course, a pure global market doesn't exist yet, but globalization is bringing it closer to a reality.