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Capable of being supposed or conjectured: a supposable outcome.

sup·pos′a·bly adv.


a US equivalent of presumably
References in classic literature ?
Over in the vacant lots was Jasper, young, coal black, and of magnificent build, sitting on a wheelbarrow in the pelting sun--at work, supposably, whereas he was in fact only preparing for it by taking an hour's rest before beginning.
It is this use of world war two legends: the formidable SS, the supposably ubiquitous 88 and the Tiger Tank that totally questions the need for an historical advisor on this film.
No one reviewed Directive 47 which supposably required that employees agree to a drug test whenever there is a "reasonable cause" to request one.