You failed observational palaeontology 32 years ago.

Failed it again today... ;-]

1) Not all, or even a majority of spheres have a dimple. Almost none have two opposing ones (how would you see both at once?)

2) Dimples are not regular nor patterned

3) Sizes are not uniform in the debris, but are locally uniform in the rock, just like concretions

4) Stems are erosion of surrounding soft rock by wind leaving a supporting pillar

5) NASA have shown how grain size of the host rock increases and becomes knobbly/segmented adjacent to spheroids

5b) Ever seen metal cuttings - they make nice spiral twists that lofge in cracks

6) They haven't laid the ground for that later announcement. It could happen, if there was strong evidence, but nobody's suggested any yet.

Don't worry though, there is no doubt at all that we will return to meridiani at the earliest opportunioty with a more capable rover (MSL?) complete with a mass spectrometer to measure the sulphur isotopes of those sulphates and ask key biological questions.