The phrase "although it is conceivable" is correct and usable in written English.
You can use it to introduce a contrasting idea or to acknowledge the possibility of something while suggesting that it may not be likely or practical.
Example: "Although it is conceivable that we could finish the project ahead of schedule, we must prepare for potential delays."
Alternatives: "even though it is possible" or "while it may be plausible".
Although it is conceivable that the flaw was never discovered by hackers, it is difficult to tell.
Both supporters and opponents said the measure was dead for the remainder of the Bush administration, although it is conceivable that individual pieces might be revived.
Although it is "conceivable in a particular case" that the district court "would refuse to transfer a case notwithstanding the counterweight of a forum-selection clause," Stewart, supra, at 30-31, 108 S.Ct.
Although it is conceivable that O3− ions could be formed if enough energy were provided to overcome the repulsion from the many electrons present in O2−, the necessary energy would not be recovered from the lattice energy, for O3− anions are so large that the lattice energy of any compound they would form would be small.
Although it is conceivable that we could have passed virus through anti-miR-122 LNA-transfected cells to screen for viruses with resistance to miR-122 inhibition, stable expression of a miRNA decoy within a population of cells provided greater control over miR-122 activity and was probably important for the success of our screen.
Fred Kirkham is listed in two Liverpool Courier accounts (here and here) as referee of two Merseyside derbies in October 1907 and April 1908, although it is conceivable that his name was confused with Tom Kirkham, an official active at the same time.
Frontboy Davis Leduke is so into the formula he's got a song called Angry Young Man and at one point sings the line, "Your parents just don't understand", although it's conceivable he's being ironic.
David Voas, Professor of Population Studies at the University of Essex said that although it was conceivable that practicing Muslims could one day outnumber practicing Christians in Britain, there is no prospect of Muslims becoming a majority.
Although it was conceivable that it would be the R1 resection, the patient wanted to receive limited resection to avoid postoperative complication mainly because she was depressed.
The 75-times capped Leinster centre's omission from the entire squad for this weekend's game will be a major talking-point although it's conceivable, given the physical demands of the competition, it may be a case of him being kept fresh for next weekend's game against Wales.
How the other justices rule is not really much in question (although it's conceivable that Kennedy might surprise some people by voting for Obamacare).
