those who say it cannot be done should not interrupt those doing it
People who dispute that a task is possible should not impede those people who attempt to do it.
interrupt
UK /ˌɪntəˈɹʌpt/ US /ˌɪntəˈɹʌpt/
verb 3noun 1
Definitions
verb
1
To disturb or halt (an ongoing process or action, or the person performing it) by interfering suddenly, especially by speaking.
A maverick politician repeatedly interrupted the debate by shouting.
Do not interrupt me in my course.
2
To divide; to separate; to break the monotony of.
The evenness of the road was not interrupted by a single hill.
3
To assert to (a computer) that an exceptional condition must be handled.
The packet receiver circuit interrupted the microprocessor.
noun
1
An event that causes a computer or other device to temporarily cease what it was doing and attend to a condition.
The interrupt caused the packet handler routine to run.
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