According to Akishev, the problem with cryptocurrencies is their lack of regulation and characteristics as an «ideal instrument for money laundering and tax evasion:» (links2exchange.net)
Shared Responsibility Agreements (SRAs) and Regional Participation Agreements (RPAs) may be ideal instruments through which to negotiate resources and support for native title projects. (humanrights.gov.au)
Both the brain - based measure and the wagering technique are far from ideal instruments to infer the presence or absence of feelings in any creature, whether healthy human adult or baby, monkey or bee. (scientificamerican.com)