Deprecatory used in a sentence

Deprecatory in a sentence as an adjective

Thought it was clearly a self deprecatory parody.

And then we find that mathematicians have wicked senses of humour so use words like “common sense” as a self-deprecatory reference to the decade they spent finding the proof :D

If instead of taking a confrontational tone you took an inquisitive, deprecatory route of acknowledging that you lack perfect knowledge of aerospace design and are curious exactly why the 787 is considered so radical a design, given the seeming lack of outward differences of appearance from existing planes, you would perhaps start an engaging, informative discussion.