prove unreliable

See: fail, neglect
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Many of these politicians will prove unreliable allies for climate and anti-pipeline activists.
Such estimates are likely to prove unreliable, but they don't include a second revenue stream: taxes on income from growing, processing, distributing and selling marijuana.
In the second half, as the Feds prove unreliable and the gangsters begin to turn nasty, John has finally had enough.
Nothing is consistent today, and people you thought trustworthy may prove unreliable.
And just in case even modern chemicals prove unreliable, the bells of St.
The sensors are suitable for precision measurements in harsh environments such as industrial, military and aerospace equipment, where electrical contacts, optical or capacitive sensors may prove unreliable or where traditional resolvers, synchros or Inductosyns are too bulky or expensive.
A literal interpretation of that form entitles her to respect now she is dropped in grade, but that contest was run at a steady early gallop and they all finished in a bit of a heap, so the bare form could prove unreliable.
Most forecasters no longer provide longer term weather reports because they can prove unreliable.
Information or tickets can be received late, flights changed, or cars prove unreliable.
John Robert Hudson's claim is that a child's "early memories" can prove unreliable in court.
These traditional file-sharing protocols were designed to share files over a local network, but perform poorly and prove unreliable in a WAN setting.
Frado's relation to home can only come from her ability to exchange labor for housing or from dependence on her husband, but both her body and her husband prove unreliable sources of support.