Set to true if you want the validity checker to discard all previously gathered information about datasets and start anew. You should use this option if you change the actor in a way that significantly changes its results, or if the website changes significantly in a way, that doesn't actually break your actor (e.g. the amount of different items available for purchase at an e-shop changes drastically).
Governs what attributes the Dataset Validity Checker considers to be numbers. If it is 'Strict', only values saved as number type will be considered as such. If 'Loose', strings that are numbers in a non-scientific notation are also handled like numbers. 'Strict' policy is generally better, but if you don't convert numbers to the proper type, using 'Loose' should give you better results.