The phrase "a conceivable means" is correct and usable in written English.
It can be used when discussing a method or way of achieving something that is possible or imaginable.
Example: "We need to explore a conceivable means of reducing our carbon footprint without sacrificing productivity."
Alternatives: "a possible method" or "an imaginable way".
Saying that people have a right to defend themselves if attacked isn't the same thing as saying they should have a right to possess any conceivable means of defending themselves – presumably, French is fine with banning grenade launchers.
"The present situation demands the use of all conceivable means for the procurement of additional labor, because it is the fighting men who benefit first of all by all armament measures.
But today he was giving a speech in Istanbul in which he insisted his new priority was to utilise "all conceivable means" to topple President Bashar al-Assad and provide desperately-needed aid to the beleaguered people of Syria.
In such an "agnostic" (in Huxley's meaning) situation, one of the very few intellectual pursuits that a theoretician could afford to accept as not being hopelessly speculative would be to examine, by all conceivable means (including in vitro experiments with aa-specific RNA aptamers), the crucial "key-lock vs. frozen accident" alternative.
"Compared to California, where Republicans seem to find every conceivable means to offend Hispanics, for example, there is a sensitivity here.
But it was a mistake to place obstacles in the path of the only conceivable means of fairly apportioning and seating delegates from two large states with a combined total of 400 delegates.
According to him, "DeLay and the Democratic Internet activists... each sought to reconfigure their political party to the same specifications — as a warrior party that would commit to opposing the other side with every conceivable means at its disposal".
They will seek every conceivable means of raising the referendum issue in the Commons.
Published on the day on which the City of London began its attempts to evict the protesters, it deployed every conceivable means of vilifying them and justifying their expulsion.
In 1967, a report urged forming special groups at the provincial and city levels to "use every conceivable means to guarantee production" each year of 13,000 tons of specially formulated red plastic — required for the covers of Mao's "Little Red Book" of quotations.
