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Making sense of WordConfidence

I'm using FREngine 12.4 and I'm trying to get the word confidence.

Following the KB article I looked at the GetRecognitionVariants() function of IWord and I'm getting strange results. From the documentation I understand that the confidence should be the percentage of confidence [0-100]. However I'm getting some negative results and even the positive results are very low (4 for correct words). 

I tried setting ExactConfidenceCalculation to true on the RecognizerParams (as well as SaveWordRecognitionVariants) but still get the same results.

 

For the following image I get these confidences:

 

 

'Sun': 10
'Mon': -4
'Tue': 1
'Wed': 2
'Thu': 6
'Fri': 3
'Sat': 8
'July': 21
'2020': 9
'18': 4
'19': 4
'20': 4
'21': 4
'22': 4
'23': 4
'24': 4
'25': 4
'26': 4
'27': 4
'28': 4
'29': 4
'30': 4
'31': 4

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