It's not possible to disable meaning inference. Note that it only affects the display meaning, it does not actually change anything in the way the data is stored. See here: https://doc.dataiku.com/dss/latest/schemas/definitions.html for more information about meanings vs storage types.
You can force the meaning to "Text" (the 'default' meaning) on multiple columns (mass actions) on the schema screen in the dataset settings.
Thanks Clement. The Mass Action is what I did after filtering for boolean. When I download the dataset after inference, those columns that have been inferred, are replaced with true / false.