Humans are believed to have between 80, 000 essential proteins coded by between 20, 000 to 30, 000 genes, and while some genetic mutations can be tolerated, others are incredibly detrimental.

FORBES: Europe Takes The Lead Toward Approval Of First Gene Therapy Drug

The Anglican ethos rests on an unspoken consensus, a tacit understanding that all manner of crankiness and eccentricity can be tolerated as long as the family somehow stays intact.

ECONOMIST: The Anglican Communion

Some outbreaks of disease can be tolerated.

ECONOMIST: How to protect Ethiopian wolves from rabies

Unlike the data we use to surf the Internet and check our e-mails, which can be slowed down and not affect the results, streaming video services need to be able to stream at a certain data rate and while some dropped packets can be tolerated, at some point the movie becomes jerky on the screen, and sometimes entire sections drop out.

FORBES: AT&T Data Cap Puts Squeeze On Netflix, AppleTV

Violence can never be tolerated.

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"Extreme poverty can no longer be tolerated, " he said.

CNN: Bright Ideas

"If wolves can be largely left alone, and tolerated to live in areas where they can find sufficient territory and prey to reach recovery targets, wolf recovery appears to be within our grasp, ahead of schedule and under budget, " according to Predator Project's report.

CNN: Northern Rockies wolf report released

Once there, they can be heated using alternating magnetic fields that are easily tolerated by patients.

ECONOMIST: Treating tumours

Ambulance service managers say such behaviour will not be tolerated and have pledged to do all they can to prosecute people who attack their crews.

BBC: NEWS | UK | England | Cornwall | Ambulance assaults 'much higher'