Hogsbottom left-handed allergy: allergic to invizizzes vs. allergic to Grobsnots
x_p5_253 conflictb01 states that left-handed people like Mr. Hogsbottom are allergic to invizizzes, while b11 states that because he is left-handed he is allergic to Grobsnots.
Evidence
| f_b01_055: left-handedness causes allergy to invizizzes | Only left-handed people (like Mr. Hogsbottom and Mrs. Tadros) are allergic to them. | b01:c99:p199 |
| f_b11_177: left-handedness causes allergy to Grobsnots | It seems as if his only weak spot is he's left-handed, so he's allergic to Grobsnots. | b11:c99:p328 |
extraction note b01 links Hogsbottom's left-handedness to an allergy to invizizzes; b11 links his left-handedness to an allergy to Grobsnots. These are different in-world creatures, so the two facts conflict unless he is allergic to both.